Photographing lens assembly, imaging apparatus and electronic device

ABSTRACT

A photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof. The object-side surface and the image-side surface of the seventh lens element are aspheric.

RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number 106124172, filed Jul. 19, 2017, which is herein incorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to a photographing lens assembly and an imaging apparatus. More particularly, the present disclosure relates to a photographing lens assembly and an imaging apparatus with enhanced imaging functionality in an off-axis region, a large aperture configuration, and a compact size while being applicable to electronic devices.

Description of Related Art

With the broadening application of photographing modules, the installation of the photographing modules in various intelligent electronic products, entertainment devices, fitness devices and smart home systems is an upward trend of future technical development. However, with the advance of science and technology, as well as the improved functionality of the electronic products, such as smartphone, the consumer demand for camera functions is also increasing (such as night photography, photographs of fast motion or depth of focus). It is known that conventional optical lens modules have difficulty satisfying the demands of a large aperture and short total track length simultaneously. Particularly, the result of photographing the off-axis region of an image is highly dictated by the aperture size. Therefore, it is the goal for manufacturers in the industry to enhance the image quality in the off-axis region while maintaining a short total track length.

SUMMARY

According to one aspect of the present disclosure, a photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric. When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is EAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the fourth lens element is R7, and a curvature radius of an image-side surface of the sixth lens element is R12, the following conditions are satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<9.5; 0≤f/R7; and 0≤f/R12.

According to another aspect of the present disclosure, an imaging apparatus includes the photographing lens assembly according to the aforementioned aspect and an image sensor, wherein the image sensor is disposed on an image surface of the photographing lens assembly.

According to further another aspect of the present disclosure, an electronic device includes the imaging apparatus according to the aforementioned aspect.

According to yet another aspect of the present disclosure, a photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The fourth lens element has positive refractive power. The sixth lens element has positive refractive power. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The object-side surface of the seventh lens element includes at least one concave shape in an off-axis region thereof, and the image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof. The object-side surface and the image-side surface of the seventh lens element are aspheric. When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the sixth lens element is R11, and a curvature radius of an image-side surface of the sixth lens element is R12, the following conditions are satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<9.5; 0≤f/R11; and 0≤f/R12.

According to still another aspect of the present disclosure, a photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric. When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an image-side surface of the third lens element is R6, and a curvature radius of an image-side surface of the sixth lens element is R12, the following conditions are satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<7.5; 0≤f/R6; and 0≤f/R12.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading the following detailed description of the embodiments, with reference made to the accompanying drawings as follows:

FIG. 1 is a schematic view of an imaging apparatus according to the 1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 1st embodiment;

FIG. 3 is a schematic view of an imaging apparatus according to the 2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 2nd embodiment;

FIG. 5 is a schematic view of an imaging apparatus according to the 3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 3rd embodiment;

FIG. 7 is a schematic view of an imaging apparatus according to the 4th embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 4th embodiment;

FIG. 9 is a schematic view of an imaging apparatus according to the 5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 5th embodiment;

FIG. 11 is a schematic view of an imaging apparatus according to the 6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 6th embodiment;

FIG. 13 is a schematic view of an imaging apparatus according to the 7th embodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 7th embodiment;

FIG. 15 is a schematic view of an imaging apparatus according to the 8th embodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 8th embodiment;

FIG. 17 is a schematic view of an imaging apparatus according to the 9th embodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 9th embodiment;

FIG. 19 is a schematic view of an imaging apparatus according to the 10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 10th embodiment;

FIG. 21 is a schematic view of an imaging apparatus according to the 11th embodiment of the present disclosure;

FIG. 22 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 11th embodiment;

FIG. 23 is a schematic view of an imaging apparatus according to the 12th embodiment of the present disclosure;

FIG. 24 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 12th embodiment;

FIG. 25 is a schematic view showing inflection points of a seventh lens element of the imaging apparatus according to the 7th embodiment in FIG. 13;

FIG. 26 is a schematic view showing critical points of the seventh lens element of the imaging apparatus according to the 7th embodiment in FIG. 13;

FIG. 27 is a schematic view showing parameters of Yc61 and Yc62 of the imaging apparatus according to the 1st embodiment in FIG. 1;

FIG. 28 is a three-dimensional view of an imaging apparatus according to the 13th embodiment of the present disclosure;

FIG. 29A is a schematic view showing a side of an electronic device according to the 14th embodiment of the present disclosure;

FIG. 29B is a schematic view showing another side of the electronic device in FIG. 29A;

FIG. 29C is a block diagram of the electronic device in FIG. 29A;

FIG. 30 is a schematic view of an electronic device according to the 15th embodiment of the present disclosure; and

FIG. 31 is a schematic view of an electronic device according to the 16th embodiment of the present disclosure.

DETAILED DESCRIPTION

A photographing lens assembly includes seven lens elements, which are, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element.

The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. Therefore, the light converging ability of the object side of the photographing lens assembly can be provided, which is favorable for shortening the total track length thereof so as to achieve compactness. The first lens element can have an image-side surface being concave in a paraxial region thereof, which is favorable for correcting astigmatism.

The second lens element with negative refractive power can have an object-side surface being convex in a paraxial region thereof and has an image-side surface being concave in a paraxial region thereof. Therefore, spherical aberration and chromatic aberration generated from the first lens element can be balanced, so that the color shift can be reduced and the image sharpness can be improved.

The third lens element can have an image-side surface being concave in a paraxial region thereof, which is favorable for correcting aberrations of the photographing lens assembly. Moreover, at least one of an object-side surface and the image-side surface of the third lens element can include at least one inflection point, which is favorable for correcting aberrations of the off-axis field.

The fourth lens element can have positive refractive power. Therefore, the distribution of the positive refractive power of the photographing lens assembly can be balanced, and the photosensitivity and spherical aberration thereof can be reduced.

The fifth lens element can have negative refractive power, so that the principal point of the photographing lens assembly can be shifted toward the object side, which is favorable for shortening the back focal length and the total track length of the photographing lens assembly.

The sixth lens element can have positive refractive power and has an object-side surface being convex in a paraxial region thereof. Therefore, it is favorable for light converging with the back focal length and the total track length thereof reduced effectively.

The seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The object-side surface of the seventh lens element can include at least one concave shape in an off-axis region thereof, and the image-side surface of the seventh lens element includes at least one convex shape in an off-axis region thereof. Therefore, the principal point of the photographing lens assembly can be shifted toward the object side, which is favorable for effectively shortening the back focal length and the total track length while correcting aberrations of the off-axis field. Furthermore, each of the object-side surface and the image-side surface of the seventh lens element can include at least two inflection points, so that the aberrations of the off-axis field can be further corrected. Moreover, each of the object-side surface and the image-side surface of the seventh lens element can include at least two critical points for correcting the off-axis aberrations.

When a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, and an axial distance between the sixth lens element and the seventh lens element is T67, the following condition is satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<9.5. Therefore, the central thickness of the fourth lens element can be balanced with the axial distance between the sixth lens element and the seventh lens element, so that the imaging functionality in an off-axis region with a large aperture configuration and the structural strength can be improved. Moreover, the surface shapes of the sixth lens element and the seventh lens element can be properly designed, so that the aberrations in the off-axis region can be corrected and the image quality can be improved. Preferably, the following condition can be satisfied: 3.0<(ΣCT/CT4)+(ΣAT/T67)<9.0. More preferably, the following condition can be satisfied: 3.0<(ΣCT/CT4)+(ΣAT/T67)<8.5. More preferably, the following condition can be satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<7.5. More preferably, the following condition can be satisfied: 4.0<(ΣCT/CT4)+(ΣAT/T67)<7.0.

When a focal length of the photographing lens assembly is f, and a curvature radius of an object-side surface of the fourth lens element is R7, the following condition can be satisfied: 0≤f/R7. Therefore, it is favorable for the configuration of the fourth lens element to improve the structural strength of photographing lens assembly.

When the focal length of the photographing lens assembly is f, and a curvature radius of an image-side surface of the sixth lens element is R12, the following condition can be satisfied: 0≤f/R12. Therefore, it is favorable for shortening the back focal length of the photographing lens assembly so as to achieve compactness.

When a focal length of the sixth lens element is f6, and a focal length of the seventh lens element is f7, the following condition can be satisfied: −2.0<f6/f7<0. Therefore, an excessive difference between the refractive power of the sixth lens element and the refractive power of the seventh lens element can be avoided. Accordingly, problems, such as over correction or insufficient correction of the aberrations, can be avoided.

When a maximum of refractive indexes of all the lens elements of the photographing lens assembly is Nmax, the following condition can be satisfied: 1.650≤Nmax<1.80. Therefore, materials of the lens elements are proper, which is favorable for the compactness of the photographing lens assembly. Accordingly, the photographing lens assembly is more applicable to compact electronic devices. Preferably, the following condition can be satisfied: 1.657≤Nmax<1.75.

When a minimum of Abbe numbers of all the lens elements of the photographing lens assembly is Vmin, the following condition can be satisfied: 10<Vmin<20. Therefore, it is favorable for eliminating chromatic aberration of the photographing lens assembly, and enhancing the image quality under a large aperture configuration.

When an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, and the axial distance between the sixth lens element and the seventh lens element is T67, the following conditions can be satisfied: 1.0<T67/T12; 1.0<T67/T23; 1.0<T67/T34; 1.0<T67/T45; and 1.0<T67/T56. Therefore, the axial distance between the sixth lens element and the seventh lens element can be increased, so that surface shapes of the sixth lens element and the seventh lens element can be properly configured to enhance the image quality in an off-axis region. Preferably, the following conditions can be satisfied: 3.0<T67/T12<50; 1.2<T67/T23<20; 2.0<T67/T34<20; 1.25<T67/T45<10; and 3.0<T67/T56. More preferably, the following conditions can be satisfied: 4.0<T67/T12<30; 1.25<T67/T23<10; 3.0<T67/T34<10; 2.0<T67/T45<8.0; and 5.0<T67/T56.

When a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, the central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, and a central thickness of the seventh lens element is CT7, the following conditions can be satisfied: 1.0<CT4/CT1; 1.0<CT4/CT2; 1.0<CT4/CT3; 1.0<CT4/CT5; 1.0<CT4/CT6; and 1.0<CT4/CT7. Therefore, the central thickness of the fourth lens element can be increased, and the overall structure of the photographing lens assembly can be improved. Moreover, the strength of the refractive power of the fourth lens element can be enhanced, which is favorable for evenly distributing the refractive power of the photographing lens assembly. Accordingly, problems, such as surface reflection, due to the steep change of the refractive power can be avoided. Preferably, the following conditions can be satisfied: 1.0<CT4/CT1<2.0; 1.5<CT4/CT2<5.0; 1.25<CT4/CT3<5.0; 1.25<CT4/CT5<3.0; 1.0<CT4/CT6<3.0; and 1.2<CT4/CT7<3.0. More preferably, the following conditions can be satisfied: 1.0<CT4/CT1<1.75; 1.75<CT4/CT2<4.0; and 1.5<CT4/CT3<4.0.

When an f-number of the photographing lens assembly is Fno, the following condition can be satisfied: 1.0<Fno<1.95. Therefore, the feature of a large aperture can be enhanced while improving the photography in depth of field photos. Preferably, the following condition can be satisfied: 1.25<Fno<1.75.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, and a maximum image height of the photographing lens assembly is ImgH, the following condition can be satisfied: 0.50<TL/ImgH<1.75. Therefore, the feature of compactness can be enhanced. Preferably, the following condition can be satisfied: 1.0<TL/ImgH<1.60.

When a focal length of the first lens element is f1, and the focal length of the sixth lens element is f6, the following condition can be satisfied: |f1|/|f6|<1.0. Therefore, an excessive photosensitivity resulted from an excessive refractive power of the sixth lens element can be prevented, and the manufacturability can be enhanced.

When the focal length of the first lens element is f1, and the focal length of the seventh lens element is f7, the following condition can be satisfied: |f1|/|f7|<1.0. Therefore, an excessive photosensitivity resulted from an excessive refractive power of the seventh lens element can be prevented, and the manufacturability can be further enhanced.

When the sum of the axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, and the axial distance between the sixth lens element and the seventh lens element is T67, the following condition can be satisfied: 1.0<ΣAT/T67<3.0. Therefore, the axial distance between the sixth lens element and the seventh lens element can be increased, so that surface shapes of the sixth lens element and the seventh lens element can be properly configured to enhance the image quality in the off-axis region.

When a vertical distance between a non-axial critical point on the object-side surface of the sixth lens element and an optical axis is Yc61, and a vertical distance between a non-axial critical point on the image-side surface of the sixth lens element and the optical axis is Yc62, the following condition can be satisfied: 0.5<Yc61/Yc62<1.5. Therefore, the correction ability for the image in the off-axis region can be further enhanced, which can improve the image quality in the off-axis region.

When the focal length of the photographing lens assembly is f, and a curvature radius of the object-side surface of the seventh lens element is R13, the following condition can be satisfied: 0.5<f/R13. Therefore, the meniscus configuration of the seventh lens element can be improved, and the variation in lens shape and thickness from the paraxial region to the off-axis region thereof can be moderated. Accordingly, the manufacturability of the seventh lens element can be enhanced.

When an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, and an entrance pupil diameter of the photographing lens assembly is EPD, the following condition can be satisfied: 1.0<TD/EPD<1.95. Therefore, the total track length and the size of the aperture of the photographing lens assembly can be balanced, which is favorable for satisfying the demands of large aperture and short total track length simultaneously.

When the focal length of the photographing lens assembly is f, and a curvature radius of the object-side surface of the sixth lens element is R11, the following condition can be satisfied: 0<f/R11. Therefore, the sixth lens element can be favorably configured with the meniscus shape of the seventh lens element so as to obtain a better combination in imaging quality and structure between lens elements.

When the axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, and the sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, the following condition can be satisfied: 1.0<TD/ΣCT≤1.70. Therefore, the limited space can be effectively used by the photographing lens assembly so as to reduce the volume and the total track length, which is favorable for the compactness. Preferably, the following condition can be satisfied: 1.0≤Td/ΣCT≤1.60. More preferably, the following condition can be satisfied: 1.20≤Td/ΣCT≤1.50.

When the focal length of the photographing lens assembly is f, and a curvature radius of the image-side surface of the third lens element is R6, the following condition can be satisfied: 0≤f/R6. Therefore, the structural strength of the photographing lens assembly can be further improved.

Each of the aforementioned features of the photographing lens assembly can be utilized in numerous combinations, so as to achieve the corresponding functionality.

According to the photographing lens assembly of the present disclosure, the lens elements thereof can be made of a plastic material or a glass material. When the lens elements are made of a plastic material, the manufacturing cost can be effectively reduced. When the lens elements are made of a glass material, the arrangement of the refractive power of the photographing lens assembly may be more flexible to design. Furthermore, surfaces of each lens element can be arranged to be aspheric (ASP), since the aspheric surface of the lens element is easy to form a shape other than spherical surface so as to have more controllable variables for eliminating aberrations thereof, and to further decrease the required number of the lens elements. Therefore, the total track length of the photographing lens assembly can also be reduced.

According to the photographing lens assembly of the present disclosure, each of an object-side surface and an image-side surface has a paraxial region and an off-axis region. The paraxial region refers to the region of the surface where light rays travel close to the optical axis, and the off-axis region refers to the region of the surface away from the paraxial region. Particularly unless otherwise specified, when the lens element has a convex surface, it indicates that the surface can be convex in the paraxial region thereof; when the lens element has a concave surface, it indicates that the surface can be concave in the paraxial region thereof. According to the photographing lens assembly of the present disclosure, the refractive power of a lens element being positive or negative or the focal length of the lens element may refer to the refractive power or the focal length in the paraxial region of the lens element.

According to the photographing lens assembly of the present disclosure, the photographing lens assembly can include at least one stop, such as an aperture stop, a glare stop or a field stop. The glare stop or the field stop is for eliminating the stray light and thereby improving the image resolution thereof.

According to the photographing lens assembly of the present disclosure, the image surface, depending on the corresponding image sensor, can be a planar surface or a curved surface, particularly a curved surface being concave toward the object side. According to the photographing lens assembly of the present disclosure, at least one image correcting element (such as a field flattener) can be selectively disposed between a lens element closest to the image surface and the image surface so as to correct image aberrations (such as the field curvature). Properties of the image correcting element, such as curvature, thickness, refractive index, position, surface shape (convex/concave, spherical/aspheric/diffractive/Fresnel etc.) can be adjusted according to the requirements of the imaging apparatus. In general, the image correcting element is preferably a thin plano-concave element having a concave surface facing toward the object side and is disposed close to the image surface.

According to the photographing lens assembly of the present disclosure, an aperture stop can be configured as a front stop or a middle stop. A front stop disposed between an imaged object and the first lens element can provide a longer distance between an exit pupil of the photographing lens assembly and the image surface to enable a telecentric effect, and thereby can improve the image-sensing efficiency of an image sensor. A middle stop disposed between the first lens element and the image surface is favorable for enlarging the field of view of the photographing lens assembly and thereby provides a wider field of view for the same.

According to the photographing lens assembly of the present disclosure, a critical point is a non-axial point of the lens surface where its tangent is perpendicular to the optical axis.

According to the photographing lens assembly of the present disclosure, an inflection point is a point on a curve of a lens surface ranging from a paraxial region to an off-axis region of the lens surface where the center of curvature of the curve changes from the object side to the image side (or from the image side to the object side).

According to the photographing lens assembly of the present disclosure, the photographing lens assembly can be applied to 3D (three-dimensional) image capturing applications, in products such as digital cameras, mobile devices, digital tablets, smart TVs, network monitoring devices, motion sensing input devices, driving recorders, rear view camera systems, wearable devices, unmanned aerial vehicles and other electronic imaging products.

According to the present disclosure, an imaging apparatus is provided. The imaging apparatus includes the photographing lens assembly according to the present disclosure and an image sensor, wherein the image sensor is disposed on or near the image surface of the aforementioned photographing lens assembly. With the photographing lens assembly having seven lens elements, the imaging functionality in an off-axis region can be enhanced, which is more apparent under the configuration of large aperture. With the fourth lens element having a thicker central thickness, the structural strength of the photographing lens assembly can be improved. With the larger axial distance between the sixth lens element and the seventh lens element, the surface shapes of the sixth lens element and the seventh lens element can be properly designed, so that the aberrations in the off-axis region can be corrected and the image quality can be improved. Moreover, the back focal length can be further shortened, which is favorable for the compactness of the photographing lens assembly. Preferably, the imaging apparatus can further include a barrel member, a holder member or a combination thereof.

According to the present disclosure, an electronic device is provided, wherein the electronic device includes the aforementioned imaging apparatus. Therefore, it is favorable for enhancing the image quality. Preferably, the electronic device can further include, but not limited to, a control unit, a display, a storage unit, a random access memory unit (RAM) or a combination thereof.

According to the above description of the present disclosure, the following 1st-16th specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an imaging apparatus according to the 1st embodiment of the present disclosure. FIG. 2 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 1st embodiment. In FIG. 1, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 195. The photographing lens assembly includes, in order from an object side to an image side, a stop 101, a first lens element 110, an aperture stop 100, a second lens element 120, a third lens element 130, a fourth lens element 140, a fifth lens element 150, a sixth lens element 160, a seventh lens element 170, an IR-cut filter 180 and an image surface 190. The image sensor 195 is disposed on the image surface 190 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (110, 120, 130, 140, 150, 160 and 170) without additional one or more lens elements inserted between the first lens element 110 and the seventh lens element 170.

The first lens element 110 with positive refractive power has an object-side surface 111 being convex in a paraxial region thereof and an image-side surface 112 being concave in a paraxial region thereof. The first lens element 110 is made of a plastic material, and has the object-side surface 111 and the image-side surface 112 being both aspheric.

The second lens element 120 with negative refractive power has an object-side surface 121 being convex in a paraxial region thereof and an image-side surface 122 being concave in a paraxial region thereof. The second lens element 120 is made of a plastic material, and has the object-side surface 121 and the image-side surface 122 being both aspheric.

The third lens element 130 with positive refractive power has an object-side surface 131 being convex in a paraxial region thereof and an image-side surface 132 being concave in a paraxial region thereof. The third lens element 130 is made of a plastic material, and has the object-side surface 131 and the image-side surface 132 being both aspheric. Furthermore, each of the object-side surface 131 and the image-side surface 132 of the third lens element 130 includes at least one inflection point.

The fourth lens element 140 with positive refractive power has an object-side surface 141 being concave in a paraxial region thereof and an image-side surface 142 being convex in a paraxial region thereof. The fourth lens element 140 is made of a plastic material, and has the object-side surface 141 and the image-side surface 142 being both aspheric.

The fifth lens element 150 with positive refractive power has an object-side surface 151 being concave in a paraxial region thereof and an image-side surface 152 being convex in a paraxial region thereof. The fifth lens element 150 is made of a plastic material, and has the object-side surface 151 and the image-side surface 152 being both aspheric.

The sixth lens element 160 with negative refractive power has an object-side surface 161 being convex in a paraxial region thereof and an image-side surface 162 being concave in a paraxial region thereof. The sixth lens element 160 is made of a plastic material, and has the object-side surface 161 and the image-side surface 162 being both aspheric.

The seventh lens element 170 with negative refractive power has an object-side surface 171 being convex in a paraxial region thereof and an image-side surface 172 being concave in a paraxial region thereof. The seventh lens element 170 is made of a plastic material, and has the object-side surface 171 and the image-side surface 172 being both aspheric. Moreover, the object-side surface 171 of the seventh lens element 170 includes at least one concave shape in an off-axis region thereof, and the image-side surface 172 of the seventh lens element 170 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 171 and the image-side surface 172 of the seventh lens element 170 includes at least two inflection points (which can refer to the inflection points IP71 and IP72 shown in FIG. 25).

The IR-cut filter 180 is made of a glass material and located between the seventh lens element 170 and the image surface 190, and will not affect the focal length of the photographing lens assembly.

The equation of the aspheric surface profiles of the aforementioned lens elements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}\text{/}R} \right)\text{/}\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y\text{/}R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{\prime} \right)}}}},$

X is the relative distance between a point on the aspheric surface spaced at a distance Y from the optical axis and the tangential plane at the aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to the optical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient.

In the photographing lens assembly according to the 1st embodiment, when a focal length of the photographing lens assembly is f, an f-number of the photographing lens assembly is Fno, and half of a maximum field of view of the photographing lens assembly is HFOV, these parameters have the following values: f=5.46 mm; Fno=1.72; and HFOV=40.0 degrees.

In the photographing lens assembly according to the 1st embodiment, when a refractive index of the first lens element 110 is N1, a refractive index of the second lens element 120 is N2, a refractive index of the third lens element 130 is N3, a refractive index of the fourth lens element 140 is N4, a refractive index of the fifth lens element 150 is N5, a refractive index of the sixth lens element 160 is N6, a refractive index of the seventh lens element 170 is N7, and a maximum of N1, N2, N3, N4, N5, N6 and N7 is Nmax, that is, the maximum of the refractive indexes of all the lens elements of the photographing lens assembly is Nmax (i.e., the refractive index of the sixth lens element 160 N6 in the 1st embodiment), the following condition is satisfied: Nmax=1.681.

In the photographing lens assembly according to the 1st embodiment, when an Abbe number of the first lens element 110 is V1, an Abbe number of the second lens element 120 is V2, an Abbe number of the third lens element 130 is V3, an Abbe number of the fourth lens element 140 is V4, an Abbe number of the fifth lens element 150 is V5, an Abbe number of the sixth lens element 160 is V6, an Abbe number of the seventh lens element 170 is V7, and a minimum of V1, V2, V3, V4, V5, V6 and V7 is Vmin, that is, the minimum of the Abbe numbers of all the lens elements of the photographing lens assembly is Vmin (i.e., the Abbe number of the sixth lens element 160 V6 in the 1st embodiment), the following condition is satisfied: Vmin=18.70.

In the photographing lens assembly according to the 1st embodiment, when a central thickness of the first lens element 110 is CT1, a central thickness of the second lens element 120 is CT2, a central thickness of the third lens element 130 is CT3, a central thickness of the fourth lens element 140 is CT4, a central thickness of the fifth lens element 150 is CT5, a central thickness of the sixth lens element 160 is CT6, and a central thickness of the seventh lens element 170 is CT7, the following conditions are satisfied: CT4/CT1=0.99; CT4/CT2=3.33; CT4/CT3=1.37; CT4/CT5=1.30; CT4/CT6=1.45; and CT4/CT7=2.13.

In the photographing lens assembly according to the 1st embodiment, when an axial distance between the first lens element 110 and the second lens element 120 is T12, an axial distance between the second lens element 120 and the third lens element 130 is T23, an axial distance between the third lens element 130 and the fourth lens element 140 is T34, an axial distance between the fourth lens element 140 and the fifth lens element 150 is T45, an axial distance between the fifth lens element 150 and the sixth lens element 160 is T56, and an axial distance between the sixth lens element 160 and the seventh lens element 170 is T67, the following conditions are satisfied: T67/T12=8.07; T67/T23=3.29; T67/T34=2.22; T67/T45=3.12; and T67/T56=18.88.

In the photographing lens assembly according to the 1st embodiment, when a sum of the central thicknesses of the lens elements of the photographing lens assembly is ΣCT (i.e., ΣCT=CT1+CT2+CT3+CT4+CT5+CT6+CT7), the central thickness of the fourth lens element 140 is CT4, a sum of the axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT (i.e., ΣAT=T12+T23+T34+T45+T56+T67), and the axial distance between the sixth lens element 160 and the seventh lens element 170 is T67, the following conditions are satisfied: (ΣCT/CT4)+(ΣAT/T67)=7.22; and ΣAT/T67=2.25.

In the photographing lens assembly according to the 1st embodiment, when an axial distance between the object-side surface 111 of the first lens element 110 and the image-side surface 172 of the seventh lens element 170 is TD, the sum of the central thicknesses of the lens elements of the photographing lens assembly is ΣCT, and an entrance pupil diameter of the photographing lens assembly is EPD, the following conditions are satisfied: TD/ΣCT=1.56; and TD/EPD=1.87.

In the photographing lens assembly according to the 1st embodiment, when an axial distance between the object-side surface 111 of the first lens element 110 and the image surface 190 is IL, and a maximum image height of the photographing lens assembly is ImgH (half of a diagonal length of an effective photosensitive area of the image sensor 195), the following condition is satisfied: TL/ImgH=1.57.

In the photographing lens assembly according to the 1st embodiment, when the focal length of the photographing lens assembly is f, a curvature radius of the image-side surface 132 of the third lens element 130 is R6, a curvature radius of the object-side surface 141 of the fourth lens element 140 is R7, a curvature radius of the object-side surface 161 of the sixth lens element 160 is R11, a curvature radius of the image-side surface 162 of the sixth lens element 160 is R12, and a curvature radius of the object-side surface 171 of the seventh lens element 170 is R13, the following conditions are satisfied: f/R6=0.05; f/R7=−0.14; f/R11=1.06; f/R12=1.67; and f/R13=1.15.

In the photographing lens assembly according to the 1st embodiment, when a focal length of the first lens element 110 is f1, a focal length of the sixth lens element 160 is f6, and a focal length of the seventh lens element 170 is f7, the following conditions are satisfied: |f1|/|f6|=0.43; |f1|/|f7|=1.13; and f6/f7=2.62.

FIG. 27 is a schematic view showing parameters of Yc61 and Yc62 of the imaging apparatus according to the 1st embodiment in FIG. 1. In FIG. 27, when a vertical distance between a non-axial critical point on the object-side surface 161 of the sixth lens element 160 and the optical axis is Yc61, and a vertical distance between a non-axial critical point on the image-side surface 162 of the sixth lens element 160 and the optical axis is Yc62, the following condition is satisfied: Yc61/Yc62=0.79.

The detailed optical data of the 1st embodiment are shown in TABLE 1 and the aspheric surface data are shown in TABLE 2 below.

TABLE 1 1st Embodiment f = 5.46 mm, Fno = 1.72, HFOV = 40.0 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Object Plano Infinity 1 Stop Plano −0.531 2 Lens 1 2.732 ASP 0.772 Plastic 1.545 56.0 6.41 3 11.342 ASP 0.142 4 Ape. Stop Plano −0.025 5 Lens 2 4.830 ASP 0.230 Plastic 1.671 19.5 −14.92 6 3.196 ASP 0.287 7 Lens 3 7.725 ASP 0.560 Plastic 1.544 55.9 15.32 8 103.478 ASP 0.425 9 Lens 4 −39.943 ASP 0.767 Plastic 1.639 23.5 549.10 10 −36.127 ASP 0.303 11 Lens 5 −3.759 ASP 0.591 Plastic 1.544 55.9 6.07 12 −1.854 ASP 0.050 13 Lens 6 5.142 ASP 0.529 Plastic 1.681 18.7 −14.81 14 3.263 ASP 0.944 15 Lens 7 4.735 ASP 0.360 Plastic 1.535 55.8 −5.65 16 1.795 ASP 0.500 17 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 18 Plano 0.398 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 1 is 1.700 mm. The effective radius of the surface 6 is 1.460 mm. The effective radius of the surface 10 is 1.810 mm. The effective radius of the surface 12 is 1.950 mm.

TABLE 2 Aspheric Coefficients Surface # 2 3 5 6 7 8 9 k =  3.0113E−02 −4.6218E+01 −9.0000E+01 −2.5753E+01 −2.1440E+01 −9.0000E+01  9.0000E+01 A4 = −5.3978E−04 −2.7070E−02  1.7804E−02  3.4249E−02 −1.8868E−02 −2.7132E−02 −4.5124E−02 A6 = −3.0328E−04  3.1436E−02 −9.2522E−02 −7.1974E−02  3.0101E−02 −1.1859E−03  4.8001E−03 A8 = −1.3271E−03 −2.7800E−02  1.8533E−01  1.0733E−01 −1.0974E−01 −6.5399E−03 −2.1044E−03 A10 =  3.2016E−03  1.3481E−02 −2.4662E−01 −1.2048E−01  2.0662E−01  1.0989E−02 −2.8103E−02 A12 = −3.8378E−03 −1.6864E−03  2.1688E−01  8.4836E−02 −2.5025E−01 −1.6128E−02  5.1834E−02 A14 =  2.4197E−03 −2.1084E−03 −1.2313E−01 −3.1622E−02  1.9019E−01  1.4207E−02 −4.6609E−02 A16 = −8.5832E−04  1.3535E−03  4.3414E−02  3.3500E−03 −8.7200E−02 −6.8672E−03  2.3560E−02 A18 =  1.5810E−04 −3.3921E−04 −8.6171E−03  1.4127E−03  2.2153E−02  1.7368E−03 −6.3629E−03 A20 = −1.1853E−05  3.2332E−05  7.3347E−04 −3.5176E−04 −2.3975E−03 −1.8617E−04  7.0883E−04 Surface # 10 11 12 13 14 15 16 k = 8.9503E+01  3.3419E−01 −1.2939E+00 −2.7531E+00 −5.9372E+00 −5.0499E+01 −7.6533E+00 A4 = −3.9298E−02  −2.1363E−02  1.2635E−02 −1.8667E−02 −2.9216E−02 −1.2663E−01 −6.9496E−02 A6 = 2.6270E−03  2.1403E−02 −8.6140E−03 −1.0177E−02  7.6262E−03  5.1234E−02  2.6276E−02 A8 = 2.0546E−02  1.3604E−02  1.1879E−02  5.5276E−03 −5.6132E−03 −1.9332E−02 −8.4222E−03 A10 = −3.5301E−02  −2.6587E−02 −7.8164E−03 −3.9003E−03  2.5021 E−03  5.6231E−03  1.9162E−03 A12 = 2.5774E−02  1.2459E−02  1.4145E−03  1.8581E−03 −6.5088E−04 −1.0469E−03 −2.8868E−04 A14 = −1.0734E−02  −1.2561E−03  7.2744E−04 −4.9793E−04  1.0372E−04  1.2048E−04  2.7936E−05 A16 = 2.7341E−03 −6.6568E−04 −3.8422E−04  6.7088E−05 −1.0058E−05 −8.3461E−06 −1.6592E−06 A18 = −4.1042E−04   2.0609E−04  6.5205E−05 −3.6095E−06  5.5114E−07  3.2037E−07  5.4511E−08 A20 = 2.8360E−05 −1.7139E−05 −3.8425E−06  2.2197E−08 −1.3235E−08 −5.2525E−09 −7.4822E−10

In TABLE 1, the curvature radius, the thickness and the focal length are shown in millimeters (mm). Surface numbers 0-19 represent the surfaces sequentially arranged from the object-side to the image-side along the optical axis. In TABLE 2, k represents the conic coefficient of the equation of the aspheric surface profiles. A4-A20 represent the aspheric coefficients ranging from the 4th order to the 20th order. The tables presented below for each embodiment are the corresponding schematic parameter and aberration curves, and the definitions of the tables are the same as TABLE 1 and TABLE 2 of the 1st embodiment. Therefore, an explanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an imaging apparatus according to the 2nd embodiment of the present disclosure. FIG. 4 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 2nd embodiment. In FIG. 3, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 295. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 200, a first lens element 210, a second lens element 220, a stop 201, a third lens element 230, a fourth lens element 240, a fifth lens element 250, a sixth lens element 260, a seventh lens element 270, an IR-cut filter 280 and an image surface 290. The image sensor 295 is disposed on the image surface 290 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (210, 220, 230, 240, 250, 260 and 270) without additional one or more lens elements inserted between the first lens element 210 and the seventh lens element 270.

The first lens element 210 with positive refractive power has an object-side surface 211 being convex in a paraxial region thereof and an image-side surface 212 being concave in a paraxial region thereof. The first lens element 210 is made of a plastic material, and has the object-side surface 211 and the image-side surface 212 being both aspheric.

The second lens element 220 with negative refractive power has an object-side surface 221 being convex in a paraxial region thereof and an image-side surface 222 being concave in a paraxial region thereof. The second lens element 220 is made of a plastic material, and has the object-side surface 221 and the image-side surface 222 being both aspheric.

The third lens element 230 with negative refractive power has an object-side surface 231 being convex in a paraxial region thereof and an image-side surface 232 being concave in a paraxial region thereof. The third lens element 230 is made of a plastic material, and has the object-side surface 231 and the image-side surface 232 being both aspheric. Furthermore, each of the object-side surface 231 and the image-side surface 232 of the third lens element 230 includes at least one inflection point.

The fourth lens element 240 with positive refractive power has an object-side surface 241 being convex in a paraxial region thereof and an image-side surface 242 being convex in a paraxial region thereof. The fourth lens element 240 is made of a plastic material, and has the object-side surface 241 and the image-side surface 242 being both aspheric.

The fifth lens element 250 with negative refractive power has an object-side surface 251 being concave in a paraxial region thereof and an image-side surface 252 being convex in a paraxial region thereof. The fifth lens element 250 is made of a plastic material, and has the object-side surface 251 and the image-side surface 252 being both aspheric.

The sixth lens element 260 with positive refractive power has an object-side surface 261 being convex in a paraxial region thereof and an image-side surface 262 being concave in a paraxial region thereof. The sixth lens element 260 is made of a plastic material, and has the object-side surface 261 and the image-side surface 262 being both aspheric.

The seventh lens element 270 with negative refractive power has an object-side surface 271 being convex in a paraxial region thereof and an image-side surface 272 being concave in a paraxial region thereof. The seventh lens element 270 is made of a plastic material, and has the object-side surface 271 and the image-side surface 272 being both aspheric. Moreover, the object-side surface 271 of the seventh lens element 270 includes at least one concave shape in an off-axis region thereof, and the image-side surface 272 of the seventh lens element 270 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 271 and the image-side surface 272 of the seventh lens element 270 includes at least two inflection points.

The IR-cut filter 280 is made of a glass material and located between the seventh lens element 270 and the image surface 290, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 2nd embodiment are shown in TABLE 3 and the aspheric surface data are shown in TABLE 4 below.

TABLE 3 2nd Embodiment f = 5.32 mm, Fno = 1.70, HFOV = 38.0 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.455 2 Lens 1 2.640 ASP 0.735 Plastic 1.545 56.1 5.57 3 18.204 ASP 0.030 4 Lens 2 3.260 ASP 0.300 Plastic 1.669 19.5 −13.31 5 2.298 ASP 0.436 6 Stop Plano 0.181 7 Lens 3 8.275 ASP 0.325 Plastic 1.669 19.5 −19.02 8 4.935 ASP 0.109 9 Lens 4 7.200 ASP 0.664 Plastic 1.544 56.0 11.07 10 −35.686 ASP 0.502 11 Lens 5 ' −6.314 ASP 0.431 Plastic 1.566 37.4 −18.03 12 −16.970 ASP 0.031 13 Lens 6 1.573 ASP 0.415 Plastic 1.544 56.0 6.48 14 2.578 ASP 0.794 15 Lens 7 2.366 ASP 0.435 Plastic 1.534 55.9 −7.43 16 1.387 ASP 0.700 17 IR-cut filter Plano 0.150 Glass 1.517 64.2 — 18 Plano 0.405 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.380 mm.

TABLE 4 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k =  9.9255E−02  8.6792E+01 −1.6329E+01 −3.4656E+00 −8.8800E+01 −1.3982E+01 −9.0000E+01 A4 = −1.3108E−03 −9.3343E−03  2.7727E−02  7.2364E−03 −1.1839E−02 −1.4976E−02  2.2148E−02 A6 = −2.7609E−04 −7.6631E−03 −3.8543E−02 −9.7762E−03 −1.9481E−02 −3.4361E−02 −5.9104E−02 A8 = −6.2768E−04  1.3987E−02  3.4984E−02  9.6887E−03  1.1607E−02  3.3190E−02  4.6080E−02 A10 = −3.9745E−04 −9.4234E−03 −1.6109E−02 −2.7215E−03 −9.5789E−03 −1.9239E−02 −1.7285E−02 A12 =  3.3846E−04  2.8278E−03  3.7863E−03 −2.2295E−04  3.1233E−03  5.6472E−03  3.3176E−03 A14 = −9.3445E−05 −3.4969E−04 −3.3899E−04  1.6251E−04 −2.6327E−04 −5.9785E−04 −2.5978E−04 Surface # 10 11 12 13 14 15 16 k = −9.0000E+01 −6.8173E−01 1.8122E+01 −5.2330E+00 −7.6024E−01 −9.2899E+00 −4.8562E+00 A4 = −6.2317E−04  9.9474E−02 −6.4510E−02   3.3669E−02  5.1520E−02 −1.5229E−01 −9.8297E−02 A6 = −1.5478E−02 −8.6421E−02 4.9816E−02 −2.7085E−02 −5.7553E−02  5.1288E−02  3.3152E−02 A8 = −4.0248E−03  5.7459E−02 −2.1093E−02   8.9926E−04  1.8283E−02 −1.0724E−02 −8.0250E−03 A10 =  7.5235E−03 −3.1899E−02 2.5766E−03  1.3720E−03 −3.3439E−03  1.5231E−03  1.2379E−03 A12 = −2.5529E−03  1.0779E−02 5.3892E−04 −3.8526E−04  3.6378E−04 −1.3635E−04 −1.1339E−04 A14 =  2.7637E−04 −1.9069E−03 −1.5571E−04   4.8768E−05 −2.1481E−05  6.8116E−06  5.6202E−06 A16 =  1.3437E−04 1.0165E−05 −2.3823E−06  5.2214E−07 −1.4396E−07 −1.1575E−07

In the 2nd embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 2nd embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 3 and TABLE 4 as the following values and satisfy the following conditions:

2nd Embodiment f (mm) 5.32 T67/T56 25.61 Fno 1.70 (ΣCT/CT4) + (ΣAT/T67) 7.60 HFOV (deg.) 38.0 ΣAT/T67 2.62 Nmax 1.669 TD/ΣCT 1.63 Vmin 19.45 TD/EPD 1.72 CT4/CT1 0.90 TL/ImgH 1.57 CT4/CT2 2.21 f/R6 1.08 CT4/CT3 2.04 f/R7 0.74 CT4/CT5 1.54 f/R11 3.38 CT4/CT6 1.60 f/R12 2.06 CT4/CT7 1.53 f/R13 2.25 T67/T12 26.47 |f1|/|f6| 0.86 T67/T23 1.29 |f1|/|f7| 0.75 T67/T34 7.28 f6/f7 −0.87 T67/T45 1.58 Yc61/Yc62 0.85

3rd Embodiment

FIG. 5 is a schematic view of an imaging apparatus according to the 3rd embodiment of the present disclosure. FIG. 6 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 3rd embodiment. In FIG. 5, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 395. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 300, a first lens element 310, a second lens element 320, a stop 301, a third lens element 330, a fourth lens element 340, a fifth lens element 350, a sixth lens element 360, a seventh lens element 370, an IR-cut filter 380 and an image surface 390. The image sensor 395 is disposed on the image surface 390 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (310, 320, 330, 340, 350, 360 and 370) without additional one or more lens elements inserted between the first lens element 310 and the seventh lens element 370.

The first lens element 310 with positive refractive power has an object-side surface 311 being convex in a paraxial region thereof and an image-side surface 312 being concave in a paraxial region thereof. The first lens element 310 is made of a plastic material, and has the object-side surface 311 and the image-side surface 312 being both aspheric.

The second lens element 320 with negative refractive power has an object-side surface 321 being convex in a paraxial region thereof and an image-side surface 322 being concave in a paraxial region thereof. The second lens element 320 is made of a plastic material, and has the object-side surface 321 and the image-side surface 322 being both aspheric.

The third lens element 330 with negative refractive power has an object-side surface 331 being convex in a paraxial region thereof and an image-side surface 332 being concave in a paraxial region thereof. The third lens element 330 is made of a plastic material, and has the object-side surface 331 and the image-side surface 332 being both aspheric. Furthermore, each of the object-side surface 331 and the image-side surface 332 of the third lens element 330 includes at least one inflection point.

The fourth lens element 340 with positive refractive power has an object-side surface 341 being convex in a paraxial region thereof and an image-side surface 342 being concave in a paraxial region thereof. The fourth lens element 340 is made of a plastic material, and has the object-side surface 341 and the image-side surface 342 being both aspheric.

The fifth lens element 350 with negative refractive power has an object-side surface 351 being concave in a paraxial region thereof and an image-side surface 352 being convex in a paraxial region thereof. The fifth lens element 350 is made of a plastic material, and has the object-side surface 351 and the image-side surface 352 being both aspheric.

The sixth lens element 360 with positive refractive power has an object-side surface 361 being convex in a paraxial region thereof and an image-side surface 362 being concave in a paraxial region thereof. The sixth lens element 360 is made of a plastic material, and has the object-side surface 361 and the image-side surface 362 being both aspheric.

The seventh lens element 370 with negative refractive power has an object-side surface 371 being convex in a paraxial region thereof and an image-side surface 372 being concave in a paraxial region thereof. The seventh lens element 370 is made of a plastic material, and has the object-side surface 371 and the image-side surface 372 being both aspheric. Moreover, the object-side surface 371 of the seventh lens element 370 includes at least one concave shape in an off-axis region thereof, and the image-side surface 372 of the seventh lens element 370 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 371 and the image-side surface 372 of the seventh lens element 370 includes at least two inflection points.

The IR-cut filter 380 is made of a glass material and located between the seventh lens element 370 and the image surface 390, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 3rd embodiment are shown in TABLE 5 and the aspheric surface data are shown in TABLE 6 below.

TABLE 5 3rd Embodiment f = 5.31 mm, Fno = 1.70, HFOV = 38.0 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.459 2 Lens 1 2.599 ASP 0.754 Plastic 1.545 56.1 5.50 3 17.569 ASP 0.030 4 Lens 2 3.356 ASP 0.300 Plastic 1.669 19.5 −12.78 5 2.323 ASP 0.437 6 Stop Plano 0.179 7 Lens 3 8.629 ASP 0.325 Plastic 1.669 19.5 −17.23 8 4.860 ASP 0.097 9 Lens 4 5.722 ASP 0.618 Plastic 1.544 56.0 11.34 10 75.612 ASP 0.513 11 Lens 5 −6.594 ASP 0.449 Plastic 1.566 37.4 −21.47 12 −14.769 ASP 0.030 13 Lens 6 1.627 ASP 0.415 Plastic 1.544 56.0 6.81 14 2.640 ASP 0.773 15 Lens 7 2.050 ASP 0.435 Plastic 1.534 55.9 −8.32 16 1.299 ASP 0.700 17 IR-cut filter Plano 0.150 Glass 1.517 64.2 — 18 Plano 0.437 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.380 mm.

TABLE 6 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k =  2.8885E−02  8.9377E+01 −1.6054E+01 −3.2905E+00  −6.9212E+01 −1.1539E+01 −9.0000E+01 A4 = −2.1511E−03 −1.8868E−03  3.3565E−02 8.7825E−03 −8.1575E−03 −9.9060E−03  4.1914E−02 A6 =  2.3216E−03 −1.9353E−02 −4.6869E−02 −6.2292E−03  −1.9567E−02 −4.6041E−02 −9.4790E−02 A8 = −3.1760E−03  2.2047E−02  3.9710E−02 9.3386E−04  1.3587E−02  4.7879E−02  7.3701E−02 A10 =  9.8102E−04 −1.2689E−02 −1.7283E−02 5.3516E−03 −1.0579E−02 −2.7427E−02 −2.9076E−02 A12 = −6.1940E−05  3.5008E−03  3.8158E−03 −3.5454E−03   3.1533E−03  7.7164E−03  5.9251E−03 A14 = −5.0465E−05 −4.0541E−04 −3.0643E−04 7.0031E−04 −2.3799E−04 −7.9657E−04 −4.9173E−04 Surface # 10 11 12 13 14 15 16 k = −4.4537E+01 −2.6716E+00 −3.2689E+01 −4.9675E+00 −9.4470E−01 −6.2854E+00 −4.2759E+00 A4 = −2.9770E−03  7.5467E−02 −7.6480E−02  3.9481E−02  6.7864E−02 −1.6024E−01 −1.0493E−01 A6 = −1.2035E−02 −5.4801E−02  5.6026E−02 −3.1589E−02 −6.7762E−02  5.5384E−02  3.6081E−02 A8 = −8.7427E−03  3.4842E−02 −2.1140E−02  2.8437E−03  2.2066E−02 −1.1680E−02 −8.7661E−03 A10 =  9.9197E−03 −2.1724E−02  1.5321E−03  8.0368E−04 −4.1799E−03  1.5807E−03  1.3478E−03 A12 = −3.1288E−03  7.9718E−03  9.8123E−04 −2.5928E−04  4.7190E−04 −1.2983E−04 −1.2243E−04 A14 =  3.2986E−04 −1.4695E−03 −2.3292E−04  3.1976E−05 −2.9314E−05  5.8742E−06  5.9771E−06 A16 =  1.0495E−04  1.5080E−05 −1.4819E−06  7.7330E−07 −1.1247E−07 −1.2028E−07

In the 3rd embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 3rd embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 5 and TABLE 6 as the following values and satisfy the following conditions:

3rd Embodiment f (mm) 5.31 T67/T56 25.77 Fno 1.70 (ΣCT/CT4) + (ΣAT/T67) 8.00 HFOV (deg.) 38.0 ΣAT/T67 2.66 Nmax 1.669 TD/ΣCT 1.62 Vmin 19.45 TD/EPD 1.71 CT4/CT1 0.82 TL/ImgH 1.57 CT4/CT2 2.06 f/R6 1.09 CT4/CT3 1.90 f/R7 0.93 CT4/CT5 1.38 f/R11 3.26 CT4/CT6 1.49 f/R12 2.01 CT4/CT7 1.42 f/R13 2.59 T67/T12 25.77 |f1|/|f6| 0.81 T67/T23 1.25 |f1|/|f7| 0.66 T67/T34 7.97 f6/f7 −0.82 T67/T45 1.51 Yc61/Yc62 0.86

4th Embodiment

FIG. 7 is a schematic view of an imaging apparatus according to the 4th embodiment of the present disclosure. FIG. 8 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 4th embodiment. In FIG. 7, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 495. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 400, a first lens element 410, a second lens element 420, a third lens element 430, a stop 401, a fourth lens element 440, a fifth lens element 450, a sixth lens element 460, a seventh lens element 470, an IR-cut filter 480 and an image surface 490. The image sensor 495 is disposed on the image surface 490 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (410, 420, 430, 440, 450, 460 and 470) without additional one or more lens elements inserted between the first lens element 410 and the seventh lens element 470.

The first lens element 410 with positive refractive power has an object-side surface 411 being convex in a paraxial region thereof and an image-side surface 412 being concave in a paraxial region thereof. The first lens element 410 is made of a plastic material, and has the object-side surface 411 and the image-side surface 412 being both aspheric.

The second lens element 420 with negative refractive power has an object-side surface 421 being convex in a paraxial region thereof and an image-side surface 422 being concave in a paraxial region thereof. The second lens element 420 is made of a plastic material, and has the object-side surface 421 and the image-side surface 422 being both aspheric.

The third lens element 430 with negative refractive power has an object-side surface 431 being convex in a paraxial region thereof and an image-side surface 432 being concave in a paraxial region thereof. The third lens element 430 is made of a plastic material, and has the object-side surface 431 and the image-side surface 432 being both aspheric. Furthermore, each of the object-side surface 431 and the image-side surface 432 of the third lens element 430 includes at least one inflection point.

The fourth lens element 440 with positive refractive power has an object-side surface 441 being convex in a paraxial region thereof and an image-side surface 442 being convex in a paraxial region thereof. The fourth lens element 440 is made of a plastic material, and has the object-side surface 441 and the image-side surface 442 being both aspheric.

The fifth lens element 450 with negative refractive power has an object-side surface 451 being concave in a paraxial region thereof and an image-side surface 452 being convex in a paraxial region thereof. The fifth lens element 450 is made of a plastic material, and has the object-side surface 451 and the image-side surface 452 being both aspheric.

The sixth lens element 460 with positive refractive power has an object-side surface 461 being convex in a paraxial region thereof and an image-side surface 462 being concave in a paraxial region thereof. The sixth lens element 460 is made of a plastic material, and has the object-side surface 461 and the image-side surface 462 being both aspheric.

The seventh lens element 470 with negative refractive power has an object-side surface 471 being convex in a paraxial region thereof and an image-side surface 472 being concave in a paraxial region thereof. The seventh lens element 470 is made of a plastic material, and has the object-side surface 471 and the image-side surface 472 being both aspheric. Moreover, the object-side surface 471 of the seventh lens element 470 includes at least one concave shape in an off-axis region thereof, and the image-side surface 472 of the seventh lens element 470 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 471 and the image-side surface 472 of the seventh lens element 470 includes at least two inflection points.

The IR-cut filter 480 is made of a glass material and located between the seventh lens element 470 and the image surface 490, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 4th embodiment are shown in TABLE 7 and the aspheric surface data are shown in TABLE 8 below.

TABLE 7 4th Embodiment f = 3.99 mm, Fno = 1.70, HFOV = 38.3 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.416 2 Lens 1 1.786 ASP 0.631 Plastic 1.545 56.0 3.49 3 26.276 ASP 0.050 4 Lens 2 10.814 ASP 0.240 Plastic 1.639 23.5 −7.78 5 3.375 ASP 0.296 6 Lens 3 4.334 ASP 0.260 Plastic 1.660 20.4 −20.54 7 3.206 ASP 0.054 8 Stop Plano 0.044 9 Lens 4 8.485 ASP 0.566 Plastic 1.544 56.0 4.69 10 −3.564 ASP 0.229 11 Lens 5 −1.135 ASP 0.320 Plastic 1.576 30.8 −6.31 12 −1.820 ASP 0.035 13 Lens 6 1.800 ASP 0.485 Plastic 1.569 39.3 4.54 14 5.355 ASP 0.425 15 Lens 7 122.166 ASP 0.340 Plastic 1.530 46.7 −3.78 16 1.972 ASP 0.500 17 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 18 Plano 0.307 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 8 is 1.150 mm.

TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 6 7 9 k = −2.6591E−01 −9.0000E+01 −6.4466E+01 −6.6090E+00 −5.5971E+01 −1.8386E+01 2.8625E+01 A4 =  2.9567E−03 −5.2167E−02 −8.9699E−02 −6.4482E−02 −8.1028E−02 −1.3381E−01 −1.3417E−01  A6 =  8.8745E−03  1.1380E−01  1.8913E−01  1.2435E−01  1.0467E−03  2.1960E−01 1.9118E−01 A8 = −1.6682E−02 −1.2717E−01 −2.2322E−01 −2.1096E−01 −1.4697E−01 −6.3599E−01 −5.0695E−01  A10 =  1.7846E−02  6.4349E−02  1.3138E−01  1.5943E−01  1.1643E−01  9.0131E−01 8.1802E−01 A12 = −8.5366E−03 −1.2560E−02 −2.6985E−02 −5.0198E−02 −2.8405E−02 −5.9417E−01 −5.7692E−01  A14 =  1.4817E−01 1.4210E−01 Surface # 10 11 12 13 14 15 16 k = −7.1110E+01 −7.1158E+00 −1.3323E+01 −1.1249E+01 −4.1320E+01  9.0000E+01 −6.7717E−01 A4 = −1.7719E−01  1.8688E−02 −1.1615E−01 −7.0045E−03  1.1758E−01 −1.5458E−01 −2.3409E−01 A6 =  2.2246E−01 −7.9376E−02  8.3932E−02 −1.1380E−01 −2.7359E−01 −4.4241E−02  8.9372E−02 A8 = −3.2705E−01  1.5406E−01  1.5727E−02  6.9597E−02  2.1219E−01  6.5260E−02 −2.2040E−02 A10 =  3.5118E−01 −1.2072E−01 −3.7500E−02 −6.2686E−05 −9.6810E−02 −2.1900E−02  3.4649E−03 A12 = −1.7555E−01  4.4355E−02  1.4389E−02 −2.2126E−02  2.5818E−02  3.4991E−03 −3.5410E−04 A14 =  1.2374E−02 −1.2442E−02 −1.6963E−03  9.5411E−03 −3.5989E−03 −2.8389E−04  1.9517E−05 A16 =  8.6880E−03 −1.2031E−03  1.9830E−04  9.7932E−06 −2.6592E−07

In the 4th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 4th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 7 and TABLE 8 as the following values and satisfy the following conditions:

4th Embodiment f (mm) 3.99 T67/T56 12.14 Fno 1.70 (ΣCT/CT4) + (ΣAT/T67) 7.69 HFOV (deg.) 38.3 ΣAT/T67 2.67 Nmax 1.660 TD/ΣCT 1.40 Vmin 20.40 TD/EPD 1.70 CT4/CT1 0.90 TL/ImgH 1.54 CT4/CT2 2.36 f/R6 1.24 CT4/CT3 2.18 f/R7 0.47 CT4/CT5 1.77 f/R11 2.21 CT4/CT6 1.17 f/R12 0.74 CT4/CT7 1.66 f/R13 0.03 T67/T12 8.50 |f1|/|f6| 0.77 T67/T23 1.44 |f1|/|f7| 0.92 T67/T34 4.34 f6/f7 −1.20 T67/T45 1.86 Yc61/Yc62 1.05

5th Embodiment

FIG. 9 is a schematic view of an imaging apparatus according to the 5th embodiment of the present disclosure. FIG. 10 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 5th embodiment. In FIG. 9, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 595. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 500, a first lens element 510, a second lens element 520, a stop 501, a third lens element 530, a fourth lens element 540, a fifth lens element 550, a sixth lens element 560, a seventh lens element 570, an IR-cut filter 580 and an image surface 590. The image sensor 595 is disposed on the image surface 590 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (510, 520, 530, 540, 550, 560 and 570) without additional one or more lens elements inserted between the first lens element 510 and the seventh lens element 570.

The first lens element 510 with positive refractive power has an object-side surface 511 being convex in a paraxial region thereof and an image-side surface 512 being concave in a paraxial region thereof. The first lens element 510 is made of a plastic material, and has the object-side surface 511 and the image-side surface 512 being both aspheric.

The second lens element 520 with negative refractive power has an object-side surface 521 being convex in a paraxial region thereof and an image-side surface 522 being concave in a paraxial region thereof. The second lens element 520 is made of a plastic material, and has the object-side surface 521 and the image-side surface 522 being both aspheric.

The third lens element 530 with positive refractive power has an object-side surface 531 being concave in a paraxial region thereof and an image-side surface 532 being convex in a paraxial region thereof. The third lens element 530 is made of a plastic material, and has the object-side surface 531 and the image-side surface 532 being both aspheric. Furthermore, the image-side surface 532 of the third lens element 530 includes at least one inflection point.

The fourth lens element 540 with positive refractive power has an object-side surface 541 being concave in a paraxial region thereof and an image-side surface 542 being convex in a paraxial region thereof. The fourth lens element 540 is made of a plastic material, and has the object-side surface 541 and the image-side surface 542 being both aspheric.

The fifth lens element 550 with negative refractive power has an object-side surface 551 being concave in a paraxial region thereof and an image-side surface 552 being convex in a paraxial region thereof. The fifth lens element 550 is made of a plastic material, and has the object-side surface 551 and the image-side surface 552 being both aspheric.

The sixth lens element 560 with positive refractive power has an object-side surface 561 being convex in a paraxial region thereof and an image-side surface 562 being concave in a paraxial region thereof. The sixth lens element 560 is made of a plastic material, and has the object-side surface 561 and the image-side surface 562 being both aspheric.

The seventh lens element 570 with negative refractive power has an object-side surface 571 being convex in a paraxial region thereof and an image-side surface 572 being concave in a paraxial region thereof. The seventh lens element 570 is made of a plastic material, and has the object-side surface 571 and the image-side surface 572 being both aspheric. Moreover, the object-side surface 571 of the seventh lens element 570 includes at least one concave shape in an off-axis region thereof, and the image-side surface 572 of the seventh lens element 570 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 571 and the image-side surface 572 of the seventh lens element 570 includes at least two inflection points. Furthermore, each of the object-side surface 571 and the image-side surface 572 of the seventh lens element 570 includes at least two critical points (which can refer to the critical points CP71 and CP72 shown in FIG. 26).

The IR-cut filter 580 is made of a glass material and located between the seventh lens element 570 and the image surface 590, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 5th embodiment are shown in TABLE 9 and the aspheric surface data are shown in TABLE 10 below.

TABLE 9 5th Embodiment f = 4.20 mm, Fno = 1.80, HFOV = 39.2 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.347 2 Lens 1 2.238 ASP 0.530 Plastic 1.545 56.0 4.17 3 129.041 ASP 0.040 4 Lens 2 2.025 ASP 0.230 Plastic 1.645 22.4 −8.00 5 1.389 ASP 0.420 6 Stop Plano 0.132 7 Lens 3 −15.077 ASP 0.296 Plastic 1.544 56.0 16.44 8 −5.652 ASP 0.040 9 Lens 4 −24.589 ASP 0.815 Plastic 1.544 56.0 9.91 10 −4.474 ASP 0.143 11 Lens 5 −1.382 ASP 0.328 Plastic 1.665 20.4 −6.31 12 −2.257 ASP 0.040 13 Lens 6 1.593 ASP 0.427 Plastic 1.544 56.0 5.12 14 3.372 ASP 0.601 15 Lens 7 1.853 ASP 0.375 Plastic 1.546 54.5 −6.64 16 1.138 ASP 0.550 17 IR-cut filter Plano 0.285 Glass 1.517 64.2 — 18 Plano 0.389 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.110 mm.

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k = 1.5590E−01 9.0000E+01 −6.1361E+00 −3.9539E+00 −9.0000E+01 −9.0000E+01  1.6178E+00 A4 = 1.0919E−02 −2.7227E−04  −5.1070E−02  1.8752E−02 −1.5859E−02 −7.8014E−02 −3.2325E−02 A6 = −1.2524E−02  6.3556E−02  1.0328E−01 −3.2847E−03 −1.9089E−02  3.8578E−02 −3.8123E−02 A8 = 3.2473E−02 −9.9493E−02  −1.4527E−01  2.9537E−02 −4.6037E−03 −1.8391E−03  1.0788E−01 A10 = −4.3062E−02  7.2577E−02  1.1369E−01 −4.5327E−02  2.7955E−02  2.0013E−02 −7.5178E−02 A12 = 3.0185E−02 −2.2066E−02  −4.5580E−02  3.2750E−02 −2.6462E−02 −2.1220E−02  2.3377E−02 A14 = −8.3539E−03  2.9292E−04  5.4037E−03 −9.3500E−03  8.3186E−03  5.2558E−03 −2.7531E−03 Surface # 10 11 12 13 14 15 16 k =  2.3284E+00 −9.6017E+00 −3.0263E−01 −1.3474E+01 −2.9606E−01 −1.0665E+01 −4.3278E+00 A4 = −2.2960E−02 −1.9011E−01 −9.9587E−02  1.2010E−01  9.7245E−02 −1.3607E−01 −1.1433E−01 A6 = −1.7494E−01  1.7842E−01  2.1667E−01 −1.0202E−01 −9.3221E−02  1.9801E−02  3.9075E−02 A8 =  2.5976E−01 −4.7790E−02 −1.7584E−01  3.4714E−02  3.2941E−02  6.0145E−03 −1.0250E−02 A10 = −1.6307E−01 −2.2058E−02  8.1197E−02 −8.5679E−03 −7.0203E−03 −2.3549E−03  1.7712E−03 A12 =  4.8033E−02  1.9994E−02 −2.0344E−02  1.3607E−03  9.3745E−04  3.2703E−04 −1.7404E−04 A14 = −5.2392E−03 −5.3736E−03  2.5659E−03 −9.3379E−05 −7.1995E−05 −2.1339E−05  8.8751E−06 A16 =  5.0410E−04 −1.2767E−04  6.7672E−07  2.3715E−06  5.4192E−07 −1.8554E−07

In the 5th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 5th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 9 and TABLE 10 as the following values and satisfy the following conditions:

5th Embodiment f (mm) 4.20 T67/T56 15.03 Fno 1.80 (ΣCT/CT4) + (ΣAT/T67) 6.04 HFOV (deg.) 39.2 ΣAT/T67 2.36 Nmax 1.665 TD/ΣCT 1.47 Vmin 20.40 TD/EPD 1.89 CT4/CT1 1.54 TL/ImgH 1.60 CT4/CT2 3.54 f/R6 −0.74 CT4/CT3 2.75 f/R7 −0.17 CT4/CT5 2.48 f/R11 2.64 CT4/CT6 1.91 f/R12 1.24 CT4/CT7 2.17 f/R13 2.27 T67/T12 15.03 |f1|/|f6| 0.82 T67/T23 1.09 |f1|/|f7| 0.63 T67/T34 15.03 f6/f7 −0.77 T67/T45 4.20 Yc61/Yc62 0.84

6th Embodiment

FIG. 11 is a schematic view of an imaging apparatus according to the 6th embodiment of the present disclosure. FIG. 12 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 6th embodiment. In FIG. 11, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 695. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 600, a first lens element 610, a second lens element 620, a stop 601, a third lens element 630, a fourth lens element 640, a fifth lens element 650, a sixth lens element 660, a seventh lens element 670, an IR-cut filter 680 and an image surface 690. The image sensor 695 is disposed on the image surface 690 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (610, 620, 630, 640, 650, 660 and 670) without additional one or more lens elements inserted between the first lens element 610 and the seventh lens element 670.

The first lens element 610 with positive refractive power has an object-side surface 611 being convex in a paraxial region thereof and an image-side surface 612 being concave in a paraxial region thereof. The first lens element 610 is made of a plastic material, and has the object-side surface 611 and the image-side surface 612 being both aspheric.

The second lens element 620 with negative refractive power has an object-side surface 621 being convex in a paraxial region thereof and an image-side surface 622 being concave in a paraxial region thereof. The second lens element 620 is made of a plastic material, and has the object-side surface 621 and the image-side surface 622 being both aspheric.

The third lens element 630 with negative refractive power has an object-side surface 631 being concave in a paraxial region thereof and an image-side surface 632 being concave in a paraxial region thereof. The third lens element 630 is made of a plastic material, and has the object-side surface 631 and the image-side surface 632 being both aspheric. Furthermore, the image-side surface 632 of the third lens element 630 includes at least one inflection point.

The fourth lens element 640 with positive refractive power has an object-side surface 641 being convex in a paraxial region thereof and an image-side surface 642 being convex in a paraxial region thereof. The fourth lens element 640 is made of a plastic material, and has the object-side surface 641 and the image-side surface 642 being both aspheric.

The fifth lens element 650 with negative refractive power has an object-side surface 651 being concave in a paraxial region thereof and an image-side surface 652 being convex in a paraxial region thereof. The fifth lens element 650 is made of a plastic material, and has the object-side surface 651 and the image-side surface 652 being both aspheric.

The sixth lens element 660 with positive refractive power has an object-side surface 661 being convex in a paraxial region thereof and an image-side surface 662 being concave in a paraxial region thereof. The sixth lens element 660 is made of a plastic material, and has the object-side surface 661 and the image-side surface 662 being both aspheric.

The seventh lens element 670 with negative refractive power has an object-side surface 671 being convex in a paraxial region thereof and an image-side surface 672 being concave in a paraxial region thereof. The seventh lens element 670 is made of a plastic material, and has the object-side surface 671 and the image-side surface 672 being both aspheric. Moreover, the object-side surface 671 of the seventh lens element 670 includes at least one concave shape in an off-axis region thereof, and the image-side surface 672 of the seventh lens element 670 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 671 and the image-side surface 672 of the seventh lens element 670 includes at least two inflection points. Furthermore, each of the object-side surface 671 and the image-side surface 672 of the seventh lens element 670 includes at least two critical points.

The IR-cut filter 680 is made of a glass material and located between the seventh lens element 670 and the image surface 690, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 6th embodiment are shown in TABLE 11 and the aspheric surface data are shown in TABLE 12 below.

TABLE 11 6th Embodiment f = 4.22 mm, Fno = 1.80, HFOV = 39.3 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe# Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.362 2 Lens 1 2.169 ASP 0.533 Plastic 1.545 56.0 4.43 3 19.514 ASP 0.040 4 Lens 2 2.061 ASP 0.230 Plastic 1.648 22.0 −9.75 5 1.486 ASP 0.395 6 Stop Plano 0.104 7 Lens 3 −48.674 ASP 0.240 Plastic 1.544 56.0 −30.49 8 25.203 ASP 0.055 9 Lens 4 7.925 ASP 0.891 Plastic 1.544 56.0 4.66 10 −3.584 ASP 0.132 11 Lens 5 −1.341 ASP 0.413 Plastic 1.664 20.5 −6.42 12 −2.198 ASP 0.040 13 Lens 6 1.455 ASP 0.360 Plastic 1.544 56.0 6.10 14 2.366 ASP 0.638 15 Lens 7 1.990 ASP 0.375 Plastic 1.552 49.3 −6.36 16 1.185 ASP 0.500 17 IR-cut filter Plano 0.285 Glass 1.517 64.2 — 18 Plano 0.410 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.110 mm.

TABLE 12 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k = 1.4554E−01 9.0000E+01 −8.6339E+00 −3.4993E+00 9.0000E+01 9.0000E+01 −9.0000E+01 A4 = 1.0181E−02 −4.7692E−02  −4.2445E−02 −7.4627E−03 −6.1162E−02  −2.3871E−01  −1.9026E−01 A6 = −1.3817E−02  1.7031E−01  1.4381E−01  3.4565E−02 2.6250E−02 1.1276E−01  4.2644E−02 A8 = 3.7921E−02 −2.5741E−01  −2.3485E−01 −8.0279E−03 −1.7650E−02  1.9325E−01  2.5120E−01 A10 = −5.0104E−02  2.0932E−01  2.0280E−01 −2.2941E−02 3.4940E−02 −2.5755E−01  −2.9480E−01 A12 = 3.4299E−02 −8.6158E−02  −9.0999E−02  2.4988E−02 −3.1021E−02  1.2415E−01  1.3288E−01 A14 = −9.3457E−03  1.2736E−02  1.5341E−02 −7.4871E−03 8.7361E−03 −2.2621E−02  −2.1864E−02 Surface # 10 11 12 13 14 15 16 k =  2.8995E+00 −7.2594E+00 −3.3328E−01 −8.2304E+00 −1.8355E+00 −1.4767E+01 −5.3551E+00 A4 = −2.2136E−02 −1.2156E−01 −6.4901E−02  8.5537E−02  6.3905E−02 −1.5883E−01 −1.1418E−01 A6 = −1.6201E−01  2.3305E−02  1.3013E−01 −7.6512E−02 −7.8717E−02  4.1388E−02  4.2549E−02 A8 =  2.5026E−01  1.2120E−01 −8.9939E−02  1.7353E−02  2.9315E−02 −1.1451E−03 −1.1189E−02 A10 = −1.6012E−01 −1.4095E−01  2.9761E−02 −7.6782E−04 −6.3269E−03 −1.1595E−03  1.8503E−03 A12 =  4.7111E−02  7.3124E−02 −1.5833E−03 −8.1392E−04  8.4647E−04  2.2040E−04 −1.7453E−04 A14 = −5.1196E−03 −1.8365E−02 −1.1174E−03  2.3978E−04 −6.4951E−05 −1.6674E−05  8.6990E−06 A16 =  1.7933E−03  1.6626E−04 −2.0131E−05  2.1177E−06  4.7233E−07 −1.8192E−07

In the 6th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 6th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 11 and TABLE 12 as the following values and satisfy the following conditions:

6th Embodiment f (mm) 4.22 T67/T56 15.95 Fno 1.80 (ΣCT/CT4) + (ΣAT/T67) 5.61 HFOV (deg.) 39.3 ΣAT/T67 2.20 Nmax 1.664 TD/ΣCT 1.46 Vmin 20.52 TD/EPD 1.90 CT4/CT1 1.67 TL/ImgH 1.60 CT4/CT2 3.87 f/R6 0.17 CT4/CT3 3.71 f/R7 0.53 CT4/CT5 2.16 f/R11 2.90 CT4/CT6 2.48 f/R12 1.78 CT4/CT7 2.38 f/R13 2.12 T67/T12 15.95 |f1|/|f6| 0.73 T67/T23 1.28 |f1|/|f7| 0.70 T67/T34 11.60 f6/f7 −0.96 T67/T45 4.83 Yc61/Yc62 0.83

7th Embodiment

FIG. 13 is a schematic view of an imaging apparatus according to the 7th embodiment of the present disclosure. FIG. 14 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 7th embodiment. In FIG. 13, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 795. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 700, a first lens element 710, a second lens element 720, a stop 701, a third lens element 730, a fourth lens element 740, a fifth lens element 750, a sixth lens element 760, a seventh lens element 770, an IR-cut filter 780 and an image surface 790. The image sensor 795 is disposed on the image surface 790 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (710, 720, 730, 740, 750, 760 and 770) without additional one or more lens elements inserted between the first lens element 710 and the seventh lens element 770.

The first lens element 710 with positive refractive power has an object-side surface 711 being convex in a paraxial region thereof and an image-side surface 712 being concave in a paraxial region thereof. The first lens element 710 is made of a plastic material, and has the object-side surface 711 and the image-side surface 712 being both aspheric.

The second lens element 720 with negative refractive power has an object-side surface 721 being convex in a paraxial region thereof and an image-side surface 722 being concave in a paraxial region thereof. The second lens element 720 is made of a plastic material, and has the object-side surface 721 and the image-side surface 722 being both aspheric.

The third lens element 730 with negative refractive power has an object-side surface 731 being convex in a paraxial region thereof and an image-side surface 732 being concave in a paraxial region thereof. The third lens element 730 is made of a plastic material, and has the object-side surface 731 and the image-side surface 732 being both aspheric. Furthermore, each of the object-side surface 731 and the image-side surface 732 of the third lens element 730 includes at least one inflection point.

The fourth lens element 740 with positive refractive power has an object-side surface 741 being convex in a paraxial region thereof and an image-side surface 742 being convex in a paraxial region thereof. The fourth lens element 740 is made of a plastic material, and has the object-side surface 741 and the image-side surface 742 being both aspheric.

The fifth lens element 750 with negative refractive power has an object-side surface 751 being concave in a paraxial region thereof and an image-side surface 752 being convex in a paraxial region thereof. The fifth lens element 750 is made of a plastic material, and has the object-side surface 751 and the image-side surface 752 being both aspheric.

The sixth lens element 760 with positive refractive power has an object-side surface 761 being convex in a paraxial region thereof and an image-side surface 762 being concave in a paraxial region thereof. The sixth lens element 760 is made of a plastic material, and has the object-side surface 761 and the image-side surface 762 being both aspheric.

The seventh lens element 770 with negative refractive power has an object-side surface 771 being convex in a paraxial region thereof and an image-side surface 772 being concave in a paraxial region thereof. The seventh lens element 770 is made of a plastic material, and has the object-side surface 771 and the image-side surface 772 being both aspheric. Moreover, the object-side surface 771 of the seventh lens element 770 includes at least one concave shape in an off-axis region thereof, and the image-side surface 772 of the seventh lens element 770 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 771 and the image-side surface 772 of the seventh lens element 770 includes at least two inflection points. Furthermore, each of the object-side surface 771 and the image-side surface 772 of the seventh lens element 770 includes at least two critical points.

The IR-cut filter 780 is made of a glass material and located between the seventh lens element 770 and the image surface 790, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 7th embodiment are shown in TABLE 13 and the aspheric surface data are shown in TABLE 14 below.

TABLE 13 7th Embodiment f = 4.22 mm, Fno = 1.80, HFOV = 41.0 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe# Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.311 2 Lens 1 2.306 ASP 0.500 Plastic 1.545 56.0 4.81 3 17.750 ASP 0.040 4 Lens 2 2.101 ASP 0.240 Plastic 1.660 20.4 −10.06 5 1.523 ASP 0.416 6 Stop Plano 0.091 7 Lens 3 7.527 ASP 0.276 Plastic 1.544 56.0 −20.28 8 4.416 ASP 0.126 9 Lens 4 4.976 ASP 0.808 Plastic 1.544 56.0 4.72 10 −5.007 ASP 0.219 11 Lens 5 −1.295 ASP 0.310 Plastic 1.660 20.4 −9.27 12 −1.800 ASP 0.040 13 Lens 6 1.407 ASP 0.364 Plastic 1.544 56.0 8.45 14 1.842 ASP 0.653 15 Lens 7 1.760 ASP 0.379 Plastic 1.534 55.9 −9.57 16 1.211 ASP 0.550 17 IR-cut filter Plano 0.285 Glass 1.517 64.2 — 18 Plano 0.345 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.150 mm. The effective radius of the surface 16 is 3.020 mm.

TABLE 14 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k =  5.1143E−01 2.8976E+01 −1.2198E+01 −3.0010E+00 2.8315E+01 −9.0000E+01 −1.4825E+01 A4 = −2.1610E−04 −2.4388E−02   4.3838E−02 −9.7708E−03 −1.0908E−01  −7.6995E−02 −1.1999E−01 A6 = −5.7045E−03 9.3623E−02 −7.7250E−03  4.0220E−02 1.1048E−01  2.8844E−02  1.6010E−01 A8 =  1.2959E−02 −1.3943E−01  −2.7683E−02 −1.7980E−02 −2.2510E−01  −1.0988E−01 −2.4751E−01 A10 = −2.3344E−02 9.7252E−02  1.3230E−02 −2.2625E−02 2.3214E−01  9.0697E−02  1.7812E−01 A12 =  1.7543E−02 −3.4372E−02   2.1481E−03  2.5187E−02 −1.2873E−01  −2.0458E−02 −5.5434E−02 A14 = −5.8781E−03 3.7632E−03 −1.6543E−03 −6.5220E−03 2.9323E−02  1.6207E−04  6.3380E−03 Surface # 10 11 12 13 14 15 16 k =  5.8083E−01 −2.5201E+00 −6.6509E−01 −4.0340E+00 −7.4077E−01 −1.0545E+01 −5.3023E+00 A4 = −1.7282E−01 −1.5451E−01 −8.3921E−02  1.7937E−02  7.5058E−04 −1.7533E−01 −1.2251E−01 A6 =  1.8002E−01  2.5996E−01  1.7320E−01 −3.2483E−02 −5.7045E−02  4.9811E−02  4.4837E−02 A8 = −1.0474E−01 −1.9616E−01 −1.3478E−01 −1.2321E−03  2.5194E−02 −3.6951E−03 −1.1612E−02 A10 =  2.6362E−02  8.6807E−02  6.1936E−02  5.1019E−03 −6.3076E−03 −6.2791E−04  1.9701E−03 A12 = −1.8815E−03 −1.9772E−02 −1.4268E−02 −2.0241E−03  9.7688E−04  1.4873E−04 −1.9568E−04 A14 =  1.7589E−03  1.3598E−03  3.6988E−04 −8.5855E−05 −1.1285E−05  1.0396E−05 A16 = −2.4102E−05 −2.5328E−05  3.1845E−06  3.0399E−07 −2.3201E−07

In the 7th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 7th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 13 and TABLE 14 as the following values and satisfy the following conditions:

7th Embodiment f (mm) 4.22 T67/T56 16.33 Fno 1.80 (ΣCT/CT4) + (ΣAT/T67) 5.99 HFOV (deg.) 41.0 ΣAT/T67 2.43 Nmax 1.660 TD/ΣCT 1.55 Vmin 20.40 TD/EPD 1.90 CT4/CT1 1.62 TL/ImgH 1.51 CT4/CT2 3.37 f/R6 0.96 CT4/CT3 2.93 f/R7 0.85 CT4/CT5 2.61 f/R11 3.00 CT4/CT6 2.22 f/R12 2.29 CT4/CT7 2.13 f/R13 2.40 T67/T12 16.33 |f1|/|f6| 0.57 T67/T23 1.29 |f1|/|f7| 0.50 T67/T34 5.18 f6/f7 −0.88 T67/T45 2.98 Yc61/Yc62 0.83

8th Embodiment

FIG. 15 is a schematic view of an imaging apparatus according to the 8th embodiment of the present disclosure. FIG. 16 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 8th embodiment. In FIG. 15, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 895. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 800, a first lens element 810, a second lens element 820, a stop 801, a third lens element 830, a fourth lens element 840, a fifth lens element 850, a sixth lens element 860, a seventh lens element 870, an IR-cut filter 880 and an image surface 890. The image sensor 895 is disposed on the image surface 890 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (810, 820, 830, 840, 850, 860 and 870) without additional one or more lens elements inserted between the first lens element 810 and the seventh lens element 870.

The first lens element 810 with positive refractive power has an object-side surface 811 being convex in a paraxial region thereof and an image-side surface 812 being concave in a paraxial region thereof. The first lens element 810 is made of a plastic material, and has the object-side surface 811 and the image-side surface 812 being both aspheric.

The second lens element 820 with negative refractive power has an object-side surface 821 being convex in a paraxial region thereof and an image-side surface 822 being concave in a paraxial region thereof. The second lens element 820 is made of a plastic material, and has the object-side surface 821 and the image-side surface 822 being both aspheric.

The third lens element 830 with negative refractive power has an object-side surface 831 being convex in a paraxial region thereof and an image-side surface 832 being concave in a paraxial region thereof. The third lens element 830 is made of a plastic material, and has the object-side surface 831 and the image-side surface 832 being both aspheric. Furthermore, each of the object-side surface 831 and the image-side surface 832 of the third lens element 830 includes at least one inflection point.

The fourth lens element 840 with positive refractive power has an object-side surface 841 being convex in a paraxial region thereof and an image-side surface 842 being convex in a paraxial region thereof. The fourth lens element 840 is made of a plastic material, and has the object-side surface 841 and the image-side surface 842 being both aspheric.

The fifth lens element 850 with negative refractive power has an object-side surface 851 being concave in a paraxial region thereof and an image-side surface 852 being convex in a paraxial region thereof. The fifth lens element 850 is made of a plastic material, and has the object-side surface 851 and the image-side surface 852 being both aspheric. Furthermore, the object-side surface 851 of the fifth lens element 850 includes two critical points.

The sixth lens element 860 with positive refractive power has an object-side surface 861 being convex in a paraxial region thereof and an image-side surface 862 being concave in a paraxial region thereof. The sixth lens element 860 is made of a plastic material, and has the object-side surface 861 and the image-side surface 862 being both aspheric.

The seventh lens element 870 with negative refractive power has an object-side surface 871 being convex in a paraxial region thereof and an image-side surface 872 being concave in a paraxial region thereof. The seventh lens element 870 is made of a plastic material, and has the object-side surface 871 and the image-side surface 872 being both aspheric. Moreover, the object-side surface 871 of the seventh lens element 870 includes at least one concave shape in an off-axis region thereof, and the image-side surface 872 of the seventh lens element 870 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 871 and the image-side surface 872 of the seventh lens element 870 includes at least two inflection points.

The IR-cut filter 880 is made of a glass material and located between the seventh lens element 870 and the image surface 890, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 8th embodiment are shown in TABLE 15 and the aspheric surface data are shown in TABLE 16 below.

TABLE 15 8th Embodiment f = 4.21 mm, Fno = 1.70, HFOV = 39.2 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe# Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.367 2 Lens 1 2.162 ASP 0.576 Plastic 1.545 56.1 4.65 3 13.329 ASP 0.030 4 Lens 2 2.268 ASP 0.220 Plastic 1.669 19.5 −10.34 5 1.641 ASP 0.401 6 Stop Plano 0.082 7 Lens 3 6.327 ASP 0.270 Plastic 1.544 56.0 −26.68 8 4.340 ASP 0.125 9 Lens 4 6.751 ASP 0.766 Plastic 1.544 56.0 4.87 10 −4.180 ASP 0.171 11 Lens 5 −1.301 ASP 0.312 Plastic 1.639 23.5 −7.69 12 −1.934 ASP 0.080 13 Lens 6 1.408 ASP 0.370 Plastic 1.544 56.0 6.80 14 2.061 ASP 0.715 15 Lens 7 2.431 ASP 0.397 Plastic 1.534 55.9 −6.59 16 1.356 ASP 0.500 17 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 18 Plano 0.318 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.140 mm. The effective radius of the surface 16 is 3.020 mm.

TABLE 16 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k =  5.5936E−01 −3.6496E+00 −1.4634E+01 −2.9952E+00 1.6144E+01 −8.1363E+01 −3.0920E+01 A4 = −1.4869E−03 −1.5594E−02  5.9394E−02 −6.0565E−03 −9.9918E−02  −3.2133E−02 −7.8849E−02 A6 = −1.0819E−02  2.4802E−02 −9.8088E−02  4.0392E−03 4.9263E−02 −1.0386E−01  3.3178E−02 A8 =  1.6604E−02 −2.2351E−02  1.2618E−01  3.7047E−02 −7.5155E−02   1.4985E−01 −2.6017E−02 A10 = −2.4547E−02  1.8300E−03 −1.0182E−01 −4.2750E−02 2.0950E−02 −2.0973E−01 −4.8983E−02 A12 =  1.6101E−02  3.7414E−03  4.3834E−02  2.0913E−02 1.2686E−02  1.4265E−01  5.3044E−02 A14 = −4.7871E−03 −1.8268E−03 −7.4015E−03 −3.3448E−03 −5.2957E−03  −3.1714E−02 −1.2344E−02 Surface # 10 11 12 13 14 15 16 k = −1.1340E+00 −2.7404E+00 −6.4856E−01 −7.0120E+00 −4.9462E−01 −1.4270E+01 −5.7426E+00 A4 = −1.2977E−01 −6.3418E−02 −5.9835E−02  1.1882E−01  4.4282E−02 −1.9972E−01 −1.2859E−01 A6 =  1.1565E−01  7.9500E−02  1.2042E−01 −1.7961E−01 −1.0596E−01  1.0754E−01  6.9637E−02 A8 = −6.7852E−02 −2.6014E−02 −9.1743E−02  1.3830E−01  5.4846E−02 −5.4035E−02 −3.3344E−02 A10 =  1.9636E−02 −3.9661E−03  4.5031E−02 −8.6405E−02 −1.6337E−02  2.2875E−02  1.1935E−02 A12 = −4.5861E−03  8.5646E−03 −1.1075E−02  3.9901E−02  2.7659E−03 −6.3396E−03 −2.9459E−03 A14 =  9.4237E−04 −3.0611E−03  1.1480E−03 −1.2520E−02 −1.8576E−04  1.0818E−03  4.7533E−04 A16 =  3.4064E−04 −3.0542E−05  2.4433E−03 −1.5912E−05 −1.1031E−04 −4.7085E−05 A18 = −2.6116E−04  3.5254E−06  6.1863E−06  2.5776E−06 A20 =  1.1524E−05 −1.7131E−07 −1.4705E−07 −5.9499E−08

In the 8th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 8th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 15 and TABLE 16 as the following values and satisfy the following conditions:

8th Embodiment f (mm) 4.21 T67/T56 8.94 Fno 1.70 (ΣCT/CT4) + (ΣAT/T67) 6.04 HFOV (deg.) 39.2 ΣAT/T67 2.24 Nmax 1.669 TD/ΣCT 1.55 Vmin 19.45 TD/EPD 1.82 CT4/CT1 1.33 TL/ImgH 1.57 CT4/CT2 3.48 f/R6 0.97 CT4/CT3 2.84 f/R7 0.62 CT4/CT5 2.46 f/R11 2.99 CT4/CT6 2.07 f/R12 2.05 CT4/CT7 1.93 f/R13 1.73 T67/T12 23.83 |f1|/|f6| 0.68 T67/T23 1.48 |f1|/|f7| 0.71 T67/T34 5.72 f6/f7 −1.03 T67/T45 4.18 Yc61/Yc62 0.80

9th Embodiment

FIG. 17 is a schematic view of an imaging apparatus according to the 9th embodiment of the present disclosure. FIG. 18 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 9th embodiment. In FIG. 17, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 995. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 900, a first lens element 910, a second lens element 920, a stop 901, a third lens element 930, a fourth lens element 940, a fifth lens element 950, a sixth lens element 960, a seventh lens element 970, an IR-cut filter 980 and an image surface 990. The image sensor 995 is disposed on the image surface 990 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (910, 920, 930, 940, 950, 960 and 970) without additional one or more lens elements inserted between the first lens element 910 and the seventh lens element 970.

The first lens element 910 with positive refractive power has an object-side surface 911 being convex in a paraxial region thereof and an image-side surface 912 being concave in a paraxial region thereof. The first lens element 910 is made of a plastic material, and has the object-side surface 911 and the image-side surface 912 being both aspheric.

The second lens element 920 with negative refractive power has an object-side surface 921 being convex in a paraxial region thereof and an image-side surface 922 being concave in a paraxial region thereof. The second lens element 920 is made of a plastic material, and has the object-side surface 921 and the image-side surface 922 being both aspheric.

The third lens element 930 with negative refractive power has an object-side surface 931 being convex in a paraxial region thereof and an image-side surface 932 being concave in a paraxial region thereof. The third lens element 930 is made of a plastic material, and has the object-side surface 931 and the image-side surface 932 being both aspheric. Furthermore, each of the object-side surface 931 and the image-side surface 932 of the third lens element 930 includes at least one inflection point.

The fourth lens element 940 with positive refractive power has an object-side surface 941 being convex in a paraxial region thereof and an image-side surface 942 being convex in a paraxial region thereof. The fourth lens element 940 is made of a plastic material, and has the object-side surface 941 and the image-side surface 942 being both aspheric.

The fifth lens element 950 with negative refractive power has an object-side surface 951 being concave in a paraxial region thereof and an image-side surface 952 being convex in a paraxial region thereof. The fifth lens element 950 is made of a plastic material, and has the object-side surface 951 and the image-side surface 952 being both aspheric.

The sixth lens element 960 with positive refractive power has an object-side surface 961 being convex in a paraxial region thereof and an image-side surface 962 being concave in a paraxial region thereof. The sixth lens element 960 is made of a plastic material, and has the object-side surface 961 and the image-side surface 962 being both aspheric.

The seventh lens element 970 with negative refractive power has an object-side surface 971 being convex in a paraxial region thereof and an image-side surface 972 being concave in a paraxial region thereof. The seventh lens element 970 is made of a plastic material, and has the object-side surface 971 and the image-side surface 972 being both aspheric. Moreover, the object-side surface 971 of the seventh lens element 970 includes at least one concave shape in an off-axis region thereof, and the image-side surface 972 of the seventh lens element 970 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 971 and the image-side surface 972 of the seventh lens element 970 includes at least two inflection points.

The IR-cut filter 980 is made of a glass material and located between the seventh lens element 970 and the image surface 990, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 9th embodiment are shown in TABLE 17 and the aspheric surface data are shown in TABLE 18 below.

TABLE 17 9th Embodiment f = 4.21 mm, Fno = 1.80, HFOV = 41.1 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe# Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.317 2 Lens 1 2.203 ASP 0.510 Plastic 1.545 56.1 4.57 3 17.572 ASP 0.030 4 Lens 2 2.152 ASP 0.220 Plastic 1.669 19.5 −9.96 5 1.560 ASP 0.410 6 Stop Plano 0.120 7 Lens 3 8.166 ASP 0.250 Plastic 1.544 56.0 −19.16 8 4.529 ASP 0.118 9 Lens 4 5.288 ASP 0.784 Plastic 1.544 56.0 5.02 10 −5.354 ASP 0.190 11 Lens 5 −1.375 ASP 0.315 Plastic 1.639 23.5 −9.67 12 −1.926 ASP 0.039 13 Lens 6 1.426 ASP 0.358 Plastic 1.544 56.0 8.13 14 1.919 ASP 0.700 15 Lens 7 1.977 ASP 0.421 Plastic 1.534 55.9 −8.06 16 1.254 ASP 0.550 17 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 18 Plano 0.315 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.150 mm. The effective radius of the surface 16 is 3.020 mm.

TABLE 18 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k =  4.3603E−01 −8.6633E+01 −1.2986E+01 −2.9712E+00 3.0847E+01 −9.0000E+01 −5.9681E+00 A4 = −8.6078E−04 −2.7986E−03  6.4000E−02 −7.9583E−03 −1.0897E−01  −6.8578E−02 −1.1379E−01 A6 = −1.5622E−03  2.8061E−02 −8.1243E−02  1.6407E−02 8.9470E−02  1.2515E−02  1.4808E−01 A8 = −1.3640E−03 −5.1629E−02  7.6589E−02  1.5592E−02 −1.9418E−01  −9.6222E−02 −2.3536E−01 A10 = −8.9686E−03  3.4975E−02 −5.0338E−02 −3.0302E−02 1.8310E−01  6.4403E−02  1.6523E−01 A12 =  1.0946E−02 −1.3954E−02  1.5271E−02  1.5174E−02 −8.8826E−02   2.9721E−03 −4.8407E−02 A14 = −5.3168E−03  1.3206E−03 −5.6196E−04 −1.9353E−03 1.8205E−02 −5.7950E−03  4.9727E−03 Surface # 10 11 12 13 14 15 16 k = −8.1654E−01 −2.4569E+00 −6.5119E−01 −4.6522E+00 −6.1048E−01 −1.2847E+01 −5.5055E+00 A4 = −1.8899E−01 −1.4268E−01 −7.4429E−02  4.5490E−02  9.2267E−03 −1.6758E−01 −1.1198E−01 A6 =  2.3483E−01  3.0314E−01  1.7489E−01 −5.5448E−02 −5.2485E−02  4.5464E−02  3.9662E−02 A8 = −1.7323E−01 −2.8978E−01 −1.5784E−01  1.5762E−02  1.8645E−02 −1.5484E−03 −1.0003E−02 A10 =  6.4783E−02  1.6302E−01  8.4904E−02 −3.8396E−03 −3.5852E−03 −1.2511E−03  1.6037E−03 A12 = −1.2178E−02 −5.0480E−02 −2.4019E−02  6.4855E−04  4.2641E−04  2.4032E−04 −1.4862E−04 A14 =  1.0679E−03  7.8417E−03  3.2914E−03 −2.5951E−05 −3.0836E−05 −1.7695E−05  7.4967E−06 A16 = −4.7156E−04 −1.7109E−04 −2.7816E−06  9.9335E−07  4.6892E−07 −1.6767E−07

In the 9th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 9th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 17 and TABLE 18 as the following values and satisfy the following conditions:

9th Embodiment f (mm) 4.21 T67/T56 17.95 Fno 1.80 (ΣCT/CT4) + (ΣAT/T67) 5.94 HFOV (deg.) 41.1 ΣAT/T67 2.30 Nmax 1.669 TD/ΣCT 1.56 Vmin 19.45 TD/EPD 1.91 CT4/CT1 1.54 TL/ImgH 1.49 CT4/CT2 3.56 f/R6 0.93 CT4/CT3 3.14 f/R7 0.80 CT4/CT5 2.49 f/R11 2.95 CT4/CT6 2.19 f/R12 2.19 CT4/CT7 1.86 f/R13 2.13 T67/T12 23.33 |f1|/|f6| 0.56 T67/T23 1.32 |f1|/|f7| 0.57 T67/T34 5.93 f6/f7 −1.01 T67/T45 3.68 Yc61/Yc62 0.81

10th Embodiment

FIG. 19 is a schematic view of an imaging apparatus according to the 10th embodiment of the present disclosure. FIG. 20 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 10th embodiment. In FIG. 19, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 1095. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 1000, a first lens element 1010, a second lens element 1020, a stop 1001, a third lens element 1030, a fourth lens element 1040, a fifth lens element 1050, a sixth lens element 1060, a seventh lens element 1070, an IR-cut filter 1080 and an image surface 1090. The image sensor 1095 is disposed on the image surface 1090 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (1010, 1020, 1030, 1040, 1050, 1060 and 1070) without additional one or more lens elements inserted between the first lens element 1010 and the seventh lens element 1070.

The first lens element 1010 with positive refractive power has an object-side surface 1011 being convex in a paraxial region thereof and an image-side surface 1012 being concave in a paraxial region thereof. The first lens element 1010 is made of a plastic material, and has the object-side surface 1011 and the image-side surface 1012 being both aspheric.

The second lens element 1020 with negative refractive power has an object-side surface 1021 being convex in a paraxial region thereof and an image-side surface 1022 being concave in a paraxial region thereof. The second lens element 1020 is made of a plastic material, and has the object-side surface 1021 and the image-side surface 1022 being both aspheric.

The third lens element 1030 with negative refractive power has an object-side surface 1031 being convex in a paraxial region thereof and an image-side surface 1032 being concave in a paraxial region thereof. The third lens element 1030 is made of a plastic material, and has the object-side surface 1031 and the image-side surface 1032 being both aspheric. Furthermore, each of the object-side surface 1031 and the image-side surface 1032 of the third lens element 1030 includes at least one inflection point.

The fourth lens element 1040 with positive refractive power has an object-side surface 1041 being convex in a paraxial region thereof and an image-side surface 1042 being convex in a paraxial region thereof. The fourth lens element 1040 is made of a plastic material, and has the object-side surface 1041 and the image-side surface 1042 being both aspheric.

The fifth lens element 1050 with negative refractive power has an object-side surface 1051 being concave in a paraxial region thereof and an image-side surface 1052 being convex in a paraxial region thereof. The fifth lens element 1050 is made of a plastic material, and has the object-side surface 1051 and the image-side surface 1052 being both aspheric.

The sixth lens element 1060 with positive refractive power has an object-side surface 1061 being convex in a paraxial region thereof and an image-side surface 1062 being concave in a paraxial region thereof. The sixth lens element 1060 is made of a plastic material, and has the object-side surface 1061 and the image-side surface 1062 being both aspheric.

The seventh lens element 1070 with negative refractive power has an object-side surface 1071 being convex in a paraxial region thereof and an image-side surface 1072 being concave in a paraxial region thereof. The seventh lens element 1070 is made of a plastic material, and has the object-side surface 1071 and the image-side surface 1072 being both aspheric. Moreover, the object-side surface 1071 of the seventh lens element 1070 includes at least one concave shape in an off-axis region thereof, and the image-side surface 1072 of the seventh lens element 1070 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 1071 and the image-side surface 1072 of the seventh lens element 1070 includes at least two inflection points.

The IR-cut filter 1080 is made of a glass material and located between the seventh lens element 1070 and the image surface 1090, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 10th embodiment are shown in TABLE 19 and the aspheric surface data are shown in TABLE 20 below.

TABLE 19 10th Embodiment f = 4.22 mm, Fno = 1.70, HFOV = 39.2 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe# Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.368 2 Lens 1 2.165 ASP 0.576 Plastic 1.545 56.1 4.66 3 13.268 ASP 0.030 4 Lens 2 2.272 ASP 0.220 Plastic 1.669 19.5 −10.33 5 1.644 ASP 0.396 6 Stop Plano 0.081 7 Lens 3 6.213 ASP 0.267 Plastic 1.544 56.0 −27.42 8 4.320 ASP 0.130 9 Lens 4 6.567 ASP 0.764 Plastic 1.544 56.0 4.91 10 −4.314 ASP 0.174 11 Lens 5 −1.305 ASP 0.312 Plastic 1.639 23.5 −7.76 12 −1.937 ASP 0.081 13 Lens 6 1.408 ASP 0.370 Plastic 1.544 56.0 6.79 14 2.064 ASP 0.713 15 Lens 7 2.471 ASP 0.401 Plastic 1.534 55.9 −6.59 16 1.369 ASP 0.500 17 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 18 Plano 0.316 19 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 6 is 1.135 mm.

TABLE 20 Aspheric Coefficients Surface # 2 3 4 5 7 8 9 k =  6.1064E−01 −2.8921E+00 −1.4605E+01 −2.9877E+00   1.4665E+01 −7.7178E+01 −2.3915E+01 A4 = −2.0116E−03 −1.0951E−02  6.1850E−02 −6.9717E−03  −9.4709E−02 −3.0428E−02 −7.8800E−02 A6 = −9.9980E−03  9.3835E−03 −1.0729E−01 7.3356E−03  2.7362E−02 −1.1908E−01  2.1346E−02 A8 =  1.4088E−02 −3.2594E−03  1.2750E−01 1.8499E−02 −2.4125E−02  1.8618E−01 −1.4023E−03 A10 = −2.2357E−02 −9.6511E−03 −8.9549E−02 −1.3737E−02  −4.1325E−02 −2.4472E−01 −6.7570E−02 A12 =  1.5232E−02  6.8785E−03  3.2252E−02 1.8709E−03  5.0437E−02  1.5757E−01  5.9030E−02 A14 = −4.6823E−03 −2.1015E−03 −4.2520E−03 9.2574E−04 −1.4429E−02 −3.4025E−02 −1.3057E−02 Surface# 10 11 12 13 14 15 16 k = −1.0788E+00 −2.7448E+00 −6.5616E−01 −7.0651E+00 −4.9568E−01 −1.4470E+01 −5.7248E+00 A4 = −1.2004E−01 −5.5938E−02 −6.2812E−02  1.1447E−01  3.8574E−02 −2.0009E−01 −1.2924E−01 A6 =  8.2517E−02  5.2201E−02  1.2687E−01 −1.6688E−01 −9.2998E−02  1.0974E−01  7.1205E−02 A8 = −2.4350E−02  1.5551E−02 −9.7343E−02  1.2305E−01  4.0431E−02 −5.6957E−02 −3.4893E−02 A10 = −7.8749E−03 −3.5812E−02  4.7289E−02 −7.6517E−02 −7.3307E−03  2.4551E−02  1.2707E−02 A12 =  3.9395E−03  2.1606E−02 −1.1424E−02  3.6029E−02 −6.3853E−04 −6.8427E−03 −3.1595E−03 A14 = −1.0739E−04 −5.7972E−03  1.1371E−03 −1.1551E−02  6.1445E−04  1.1667E−03  5.0973E−04 A16 =  5.7193E−04 −2.4812E−05  2.2864E−03 −1.3044E−04 −1.1841E−04 −5.0287E−05 A18 = −2.4591E−04  1.2643E−05  6.5927E−06  2.7374E−06 A20 =  1.0852E−05 −4.7979E−07 −1.5536E−07 −6.2814E−08

In the 10th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 10th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 19 and TABLE 20 as the following values and satisfy the following conditions:

10th Embodiment f (mm) 4.22 T67/T56 8.80 Fno 1.70 (ΣCT/CT4) + (ΣAT/T67) 6.06 HFOV (deg.) 39.2 ΣAT/T67 2.25 Nmax 1.669 TD/ΣCT 1.55 Vmin 19.45 TD/EPD 1.82 CT4/CT1 1.33 TL/ImgH 1.57 CT4/CT2 3.47 f/R6 0.98 CT4/CT3 2.86 f/R7 0.64 CT4/CT5 2.45 f/R11 2.99 CT4/CT6 2.06 f/R12 2.04 CT4/CT7 1.91 f/R13 1.71 T67/T12 23.77 |f1|/|f6| 0.69 T67/T23 1.49 |f1|/|f7| 0.71 T67/T34 5.48 f6/f7 −1.03 T67/T45 4.10 Yc61/Yc62 0.80

11th Embodiment

FIG. 21 is a schematic view of an imaging apparatus according to the 11th embodiment of the present disclosure. FIG. 22 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 11th embodiment. In FIG. 21, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 1195. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 1100, a first lens element 1110, a second lens element 1120, a third lens element 1130, a fourth lens element 1140, a fifth lens element 1150, a sixth lens element 1160, a seventh lens element 1170, an IR-cut filter 1180 and an image surface 1190. The image sensor 1195 is disposed on the image surface 1190 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (1110, 1120, 1130, 1140, 1150, 1160 and 1170) without additional one or more lens elements inserted between the first lens element 1110 and the seventh lens element 1170.

The first lens element 1110 with positive refractive power has an object-side surface 1111 being convex in a paraxial region thereof and an image-side surface 1112 being concave in a paraxial region thereof. The first lens element 1110 is made of a plastic material, and has the object-side surface 1111 and the image-side surface 1112 being both aspheric.

The second lens element 1120 with negative refractive power has an object-side surface 1121 being convex in a paraxial region thereof and an image-side surface 1122 being concave in a paraxial region thereof. The second lens element 1120 is made of a plastic material, and has the object-side surface 1121 and the image-side surface 1122 being both aspheric.

The third lens element 1130 with positive refractive power has an object-side surface 1131 being convex in a paraxial region thereof and an image-side surface 1132 being convex in a paraxial region thereof. The third lens element 1130 is made of a plastic material, and has the object-side surface 1131 and the image-side surface 1132 being both aspheric. Furthermore, the object-side surface 1131 of the third lens element 1130 includes at least one inflection point.

The fourth lens element 1140 with negative refractive power has an object-side surface 1141 being convex in a paraxial region thereof and an image-side surface 1142 being concave in a paraxial region thereof. The fourth lens element 1140 is made of a plastic material, and has the object-side surface 1141 and the image-side surface 1142 being both aspheric.

The fifth lens element 1150 with positive refractive power has an object-side surface 1151 being concave in a paraxial region thereof and an image-side surface 1152 being convex in a paraxial region thereof. The fifth lens element 1150 is made of a plastic material, and has the object-side surface 1151 and the image-side surface 1152 being both aspheric.

The sixth lens element 1160 with positive refractive power has an object-side surface 1161 being convex in a paraxial region thereof and an image-side surface 1162 being concave in a paraxial region thereof. The sixth lens element 1160 is made of a plastic material, and has the object-side surface 1161 and the image-side surface 1162 being both aspheric.

The seventh lens element 1170 with negative refractive power has an object-side surface 1171 being convex in a paraxial region thereof and an image-side surface 1172 being concave in a paraxial region thereof. The seventh lens element 1170 is made of a plastic material, and has the object-side surface 1171 and the image-side surface 1172 being both aspheric. Moreover, the object-side surface 1171 of the seventh lens element 1170 includes at least one concave shape in an off-axis region thereof, and the image-side surface 1172 of the seventh lens element 1170 includes at least one convex shape in an off-axis region thereof.

The IR-cut filter 1180 is made of a glass material and located between the seventh lens element 1170 and the image surface 1190, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 11th embodiment are shown in TABLE 21 and the aspheric surface data are shown in TABLE 22 below.

TABLE 21 11th Embodiment f = 5.02 mm, Fno = 1.72, HFOV = 41.5 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe# Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.509 2 Lens 1 2.284 ASP 0.719 Plastic 1.545 56.0 5.37 3 9.298 ASP 0.153 4 Lens 2 6.209 ASP 0.230 Plastic 1.681 18.7 −14.89 5 3.793 ASP 0.356 7 Lens 3 11.491 ASP 0.570 Plastic 1.544 56.0 18.19 8 −69.911 ASP 0.408 10 Lens 4 92.051 ASP 0.511 Plastic 1.660 20.4 −17.72 11 10.356 ASP 0.132 12 Lens 5 −5.625 ASP 0.577 Plastic 1.544 56.0 5.81 13 −2.096 ASP 0.050 14 Lens 6 3.300 ASP 0.350 Plastic 1.603 28.5 225.10 15 3.248 ASP 0.785 16 Lens 7 4.653 ASP 0.360 Plastic 1.515 56.5 −4.59 17 1.526 ASP 0.500 18 IR-cut filter Plano 0.210 Glass 1.517 64.2 — 19 Plano 0.393 20 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 9 is 1.800 mm. The effective radius of the surface 11 is 2.100 mm.

TABLE 22 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k =  3.1340E−02 −3.6988E+01 −9.0000E+01 −2.5528E+01 −9.0000E+01  9.0000E+01 −9.0000E+01 A4 = −3.1255E−03 −2.8887E−02 −3.8119E−02 −8.2069E−03 −2.9197E−02 −2.9058E−02 −6.1670E−02 A6 =  1.3373E−02  3.3285E−02  2.2656E−02  1.1253E−02  2.6790E−02 −3.8320E−02 −2.5760E−02 A8 = −4.2629E−02 −5.1147E−02 −1.4574E−03 −1.8914E−02 −1.1526E−01  1.0174E−01  5.6553E−02 A10 =  8.1108E−02  9.4038E−02  2.5000E−02  8.1826E−02  2.2277E−01 −1.8909E−01 −5.3722E−02 A12 = −9.5730E−02 −1.2450E−01 −7.0872E−02 −1.6528E−01 −2.8290E−01  2.0630E−01  1.4396E−02 A14 =  7.0381E−02  1.0219E−01  7.9405E−02  1.7500E−01  2.2934E−01 −1.3955E−01  1.2550E−02 A16 = −3.1365E−02 −5.0033E−02 −4.6444E−02 −1.0398E−01 −1.1527E−01  5.7470E−02 −1.2652E−02 A18 =  7.7403E−03  1.3432E−02  1.4280E−02  3.3204E−02  3.3029E−02 −1.3076E−02  4.5438E−03 A20 = −8.1373E−04 −1.5293E−03 −1.8410E−03 −4.4261E−03 −4.0960E−03  1.2454E−03 −6.3237E−04 Surface # 9 10 11 12 13 14 15 k = −9.0000E+01 1.8543E+00 −1.4611E+00 −4.5474E+00 −6.5418E+00 −9.0000E+01 −7.4877E+00 A4 = −2.5292E−02 4.0997E−02 −2.4529E−03 −4.7785E−02 −3.6911E−02 −1.7844E−01 −9.1210E−02 A6 = −1.2483E−01 −1.6785E−01   2.0538E−02  6.6777E−02  3.5489E−02  7.5421E−02  3.8576E−02 A8 =  2.2894E−01 2.9595E−01 −5.4348E−03 −7.5225E−02 −3.1938E−02 −2.7939E−02 −1.2985E−02 A10 = −2.1972E−01 −2.7645E−01  −9.7423E−03  4.6329E−02  1.4773E−02  9.0070E−03  3.1737E−03 A12 =  1.2813E−01 1.5202E−01  8.9049E−03 −1.9242E−02 −4.3172E−03 −1.9626E−03 −5.1910E−04 A14 = −4.7978E−02 −5.1250E−02  −3.3345E−03  5.4060E−03  8.2905E−04  2.6739E−04  5.4467E−05 A16 =  1.1472E−02 1.0447E−02  6.7529E−04 −9.8276E−04 −9.9488E−05 −2.2004E−05 −3.5181E−06 A18 = −1.6197E−03 −1.1818E−03  −7.3557E−05  1.0404E−04  6.6765E−06  1.0060E−06  1.2790E−07 A20 =  1.0391E−04 5.6896E−05  3.3931E−06 −4.8147E−06 −1.9027E−07 −1.9712E−08 −2.0148E−09

In the 11th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 11th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 21 and TABLE 22 as the following values and satisfy the following conditions:

11th Embodiment f (mm) 5.02 T67/T56 15.70 Fno 1.72 (ΣCT/CT4) + (ΣAT/T67) 8.89 HFOV (deg.) 41.5 ΣAT/T67 2.40 Nmax 1.681 TD/ΣCT 1.57 Vmin 18.70 TD/EPD 1.78 CT4/CT1 0.71 TL/ImgH 1.40 CT4/CT2 2.22 f/R6 −0.07 CT4/CT3 0.90 f/R7 0.05 CT4/CT5 0.89 f/R11 1.52 CT4/CT6 1.46 f/R12 1.55 CT4/CT7 1.42 f/R13 1.08 T67/T12 5.13 |f1|/|f6| 0.02 T67/T23 2.21 |f1|/|f7| 1.17 T67/T34 1.92 f6/f7 −49.04 T67/T45 5.95 Yc61/Yc62 0.93

12th Embodiment

FIG. 23 is a schematic view of an imaging apparatus according to the 12th embodiment of the present disclosure. FIG. 24 shows spherical aberration curves, astigmatic field curves and a distortion curve of the imaging apparatus according to the 12th embodiment. In FIG. 23, the imaging apparatus includes a photographing lens assembly (its reference numeral is omitted) and an image sensor 1295. The photographing lens assembly includes, in order from an object side to an image side, an aperture stop 1200, a first lens element 1210, a second lens element 1220, a third lens element 1230, a fourth lens element 1240, a fifth lens element 1250, a sixth lens element 1260, a seventh lens element 1270, an IR-cut filter 1280 and an image surface 1290. The image sensor 1295 is disposed on the image surface 1290 of the photographing lens assembly. The photographing lens assembly includes seven lens elements (1210, 1220, 1230, 1240, 1250, 1260 and 1270) without additional one or more lens elements inserted between the first lens element 1210 and the seventh lens element 1270.

The first lens element 1210 with positive refractive power has an object-side surface 1211 being convex in a paraxial region thereof and an image-side surface 1212 being concave in a paraxial region thereof. The first lens element 1210 is made of a plastic material, and has the object-side surface 1211 and the image-side surface 1212 being both aspheric.

The second lens element 1220 with negative refractive power has an object-side surface 1221 being convex in a paraxial region thereof and an image-side surface 1222 being concave in a paraxial region thereof. The second lens element 1220 is made of a plastic material, and has the object-side surface 1221 and the image-side surface 1222 being both aspheric.

The third lens element 1230 with positive refractive power has an object-side surface 1231 being convex in a paraxial region thereof and an image-side surface 1232 being concave in a paraxial region thereof. The third lens element 1230 is made of a plastic material, and has the object-side surface 1231 and the image-side surface 1232 being both aspheric. Furthermore, each of the object-side surface 1231 and the image-side surface 1232 of the third lens element 1230 includes at least one inflection point.

The fourth lens element 1240 with negative refractive power has an object-side surface 1241 being convex in a paraxial region thereof and an image-side surface 1242 being concave in a paraxial region thereof. The fourth lens element 1240 is made of a plastic material, and has the object-side surface 1241 and the image-side surface 1242 being both aspheric.

The fifth lens element 1250 with positive refractive power has an object-side surface 1251 being concave in a paraxial region thereof and an image-side surface 1252 being convex in a paraxial region thereof. The fifth lens element 1250 is made of a plastic material, and has the object-side surface 1251 and the image-side surface 1252 being both aspheric.

The sixth lens element 1260 with negative refractive power has an object-side surface 1261 being convex in a paraxial region thereof and an image-side surface 1262 being concave in a paraxial region thereof. The sixth lens element 1260 is made of a plastic material, and has the object-side surface 1261 and the image-side surface 1262 being both aspheric.

The seventh lens element 1270 with negative refractive power has an object-side surface 1271 being convex in a paraxial region thereof and an image-side surface 1272 being concave in a paraxial region thereof. The seventh lens element 1270 is made of a plastic material, and has the object-side surface 1271 and the image-side surface 1272 being both aspheric. Moreover, the object-side surface 1271 of the seventh lens element 1270 includes at least one concave shape in an off-axis region thereof, and the image-side surface 1272 of the seventh lens element 1270 includes at least one convex shape in an off-axis region thereof. Furthermore, each of the object-side surface 1271 and the image-side surface 1272 of the seventh lens element 1270 includes at least two inflection points.

The IR-cut filter 1280 is made of a glass material and located between the seventh lens element 1270 and the image surface 1290, and will not affect the focal length of the photographing lens assembly.

The detailed optical data of the 12th embodiment are shown in TABLE 23 and the aspheric surface data are shown in TABLE 24 below.

TABLE 23 12th Embodiment f = 3.35 mm, Fno = 1.67, HFOV = 45.1 deg. Surface Focal # Curvature Radius Thickness Material Index Abbe # Length 0 Object Plano Infinity 1 Ape. Stop Plano −0.228 2 Lens 1 2.225 ASP 0.422 Plastic 1.545 56.1 5.32 3 8.924 ASP 0.050 4 Lens 2 3.138 ASP 0.230 Plastic 1.681 18.7 −14.03 5 2.292 ASP 0.192 6 Lens 3 5.210 ASP 0.376 Plastic 1.544 56.0 12.84 7 19.993 ASP 0.194 8 Lens 4 9.149 ASP 0.447 Plastic 1.660 20.4 −255.50 9 8.509 ASP 0.118 10 Lens 5 −4.018 ASP 0.694 Plastic 1.544 56.0 2.94 11 −1.213 ASP 0.050 12 Lens 6 5.517 ASP 0.350 Plastic 1.681 18.7 −6.69 13 2.431 ASP 0.308 14 Lens 7 1.340 ASP 0.360 Plastic 1.544 56.0 −6.25 15 0.870 ASP 0.550 16 IR-cut filter Plano 0.175 Glass 1.517 64.2 — 17 Plano 0.327 18 Image Plano — Reference wavelength is 587.6 nm (d-line). The effective radius of the surface 7 is 1.050 mm. The effective radius of the surface 9 is 1.230 mm.

TABLE 24 Aspheric Coefficients Surface # 2 3 4 5 6 7 8 k =  7.5984E−02 −6.5426E+01 −8.2898E+01 −3.0949E+01 −3.0630E+01 −9.0000E+01 −9.0000E+01 A4 = −1.0639E−02 −1.0946E−01  1.0504E−01  1.5961E−01 −2.2860E−02 −7.2766E−02 −1.4052E−01 A6 =  1.3143E−01  4.0050E−01 −6.5087E−01 −6.0950E−01  3.7289E−02 −1.2002E−01 −7.4190E−02 A8 = −8.6104E−01 −1.3209E+00  2.0928E+00  1.0756E+00 −3.5820E−01  7.4087E−01  5.3315E−01 A10 =  3.3857E+00  3.9208E+00 −4.5952E+00 −5.8789E−01  1.9118E−01 −2.9626E+00 −2.9372E+00 A12 = −8.2017E+00 −8.9940E+00  6.2421E+00 −3.2003E+00  1.8988E+00  7.0051E+00  8.4171E+00 A14 =  1.2298E+01  1.3888E+01 −4.7811E+00  9.4743E+00 −6.6019E+00 −1.0617E+01 −1.3968E+01 A16 = −1.1095E+01 −1.3378E+01  1.4127E+00 −1.2004E+01  9.4434E+00  9.8948E+00  1.3406E+01 A18 =  5.4997E+00  7.2204E+00  5.2289E−01  7.7971E+00 −6.1578E+00 −5.0659E+00 −6.9153E+00 A20 = −1.1504E+00 −1.6607E+00 −3.6618E−01 −2.0935E+00  1.5069E+00  1.0773E+00  1.4851E+00 Surface # 9 10 11 12 13 14 15 k = −8.5913E+01 −2.0391E−01 −1.2885E+00  5.2246E+00 −2.9714E+00 −4.8668E+00 −2.9926E+00 A4 = −1.2752E−01 −1.1733E−01  1.6206E−01  1.9722E−01  5.9228E−02 −2.9028E−01 −2.6422E−01 A6 =  1.6059E−01  4.2120E−01 −5.4847E−01 −5.9384E−01 −2.5120E−01  6.3726E−02  1.6979E−01 A8 = −6.4759E−02 −3.6115E−01  1.2081E+00  8.0929E−01  2.5153E−01  1.0286E−02 −8.3200E−02 A10 = −6.5426E−01 −5.3529E−01 −1.8390E+00 −8.0005E−01 −1.5724E−01  5.2096E−03  3.0575E−02 A12 =  1.4492E+00  1.3972E+00  1.8602E+00  5.3152E−01  6.5665E−02 −8.3431E−03 −7.9610E−03 A14 = −1.4976E+00 −1.2766E+00 −1.2140E+00 −2.2087E−01 −1.8253E−02  3.0750E−03  1.3832E−03 A16 =  8.7800E−01  6.0908E−01  4.9420E−01  4.9993E−02  3.2382E−03 −5.3706E−04 −1.4908E−04 A18 = −2.8391E−01 −1.5258E−01 −1.1355E−01 −4.3765E−03 −3.2971E−04  4.6705E−05  8.7391E−06 A20 =  3.9628E−02  1.5919E−02  1.1155E−02 −6.8776E−05  1.4544E−05 −1.6313E−06 −2.0180E−07

In the 12th embodiment, the equation of the aspheric surface profiles of the aforementioned lens elements is the same as the equation of the 1st embodiment. Also, the definitions of these parameters shown in the following table are the same as those stated in the 1st embodiment with corresponding values for the 12th embodiment, so an explanation in this regard will not be provided again.

Moreover, these parameters can be calculated from TABLE 23 and TABLE 24 as the following values and satisfy the following conditions:

12th Embodiment f (mm) 3.35 T67/T56 6.16 Fno 1.67 (ΣCT/CT4) + (ΣAT/T67) 9.40 HFOV (deg.) 45.1 ΣAT/T67 2.96 Nmax 1.681 TD/ΣCT 1.32 Vmin 18.70 TD/EPD 1.89 CT4/CT1 1.06 TL/ImgH 1.50 CT4/CT2 1.94 f/R6 0.17 CT4/CT3 1.19 f/R7 0.37 CT4/CT5 0.64 f/R11 0.61 CT4/CT6 1.28 f/R12 1.38 CT4/CT7 1.24 f/R13 2.50 T67/T12 6.16 |f1|/|f6| 0.80 T67/T23 1.60 |f1|/|f7| 0.85 T67/T34 1.59 f6/f7 1.07 T67/T45 2.61 Yc61/Yc62 0.80

13th Embodiment

FIG. 28 is a three-dimensional view of an imaging apparatus 10 according to the 13th embodiment of the present disclosure. In FIG. 28, the imaging apparatus 10 according to the 13th embodiment is a camera module. The imaging apparatus 10 includes an imaging lens module 11, a driving apparatus 12 and an image sensor 13, wherein the imaging lens module 11 includes the photographing lens assembly according to the 1st embodiment and a barrel (its reference numeral is omitted) for carrying the photographing lens assembly. An image of an imaged object can be captured by the imaging apparatus 10 via the imaging lens module 11, the driving apparatus 12 is used to bring the image into focus so that the image can be clearly formed on the image sensor 13, and then the image data is generated.

The driving apparatus 12 can have an auto-focus functionality, and a driving method thereof can use a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system or a shape memory alloy system. The driving apparatus 12 enables the photographing lens assembly to obtain a preferable imaging position, so that clear images of the imaged object at different object distances can be obtained.

The image sensor 13 of the imaging apparatus 10 can have the properties of high photosensitivity and low noise (such as CMOS and CCD) and is disposed on the image surface of the photographing lens assembly, so that high image quality of the photographing lens assembly can be obtained.

Moreover, the imaging apparatus 10 can further include an image stabilizing module 14. The image stabilizing module 14 can exemplarily include an accelerator, a gyro sensor or a Hall Effect sensor. In the 13th embodiment, the image stabilizing module 14 is a gyro sensor. However, it is only exemplary and the image stabilizing module 14 is not limited thereto. By adjusting to movements in different axial directions of the photographing lens assembly, the image blur due to motion during exposure can be compensated, so that the image quality of dynamic or low-light scenes can be enhanced. Moreover, advanced image compensation functions, such as optical image stabilization (OIS) or electronic image stabilization (EIS), can be provided.

14th Embodiment

FIG. 29A is a schematic view showing a side of an electronic device 20 according to the 14th embodiment of the present disclosure. FIG. 29B is a schematic view showing another side of the electronic device 20 in FIG. 29A. FIG. 29C is a block diagram of the electronic device 20 in FIG. 29A. In FIG. 29A, FIG. 29B and FIG. 29C, the electronic device 20 of the 14th embodiment is a smartphone. The electronic device 20 includes the imaging apparatus 10, a flash module 21, a focusing assist module 22, an image signal processor 23, a user interface 24 and an image software processor 25. When a user takes a photograph via the user interface 24, light rays of the imaged object 26 are focused by the electronic device 20 via the imaging apparatus 10 for generating an image. Meanwhile, light compensation is provided by the flash module 21, the object distance of the imaged objected 26 is obtained by the focusing assist module 22 for quick focusing, and an optimized image processing is provided by the image signal processor 23 and the image software processor 25, so that the image quality of the photographing lens assembly can be further enhanced. The focusing assist module 22 can adopt conventional infrared or laser for quick focusing. The user interface 24 can adopt a touch screen or a physical button, and image processing software can be utilized through the user interface 24 for providing a variety of photographing modes and image editing functions.

The imaging apparatus 10 of the 14th embodiment can be the same as the imaging apparatus 10 of the 13th embodiment, and are not repeated herein.

15th Embodiment

FIG. 30 is a schematic view of an electronic device 30 according to the 15th embodiment of the present disclosure. The electronic device 30 of the 15th embodiment is a tablet personal computer. The electronic device 30 includes an imaging apparatus 31. The imaging apparatus 31 can be the same as that of the 13th embodiment, and will not be repeated herein.

16th Embodiment

FIG. 31 is a schematic view of an electronic device 40 according to the 16th embodiment of the present disclosure. The electronic device 40 of the 16th embodiment is a wearable device. The electronic device 40 includes an imaging apparatus 41. The imaging apparatus 41 can be the same as that of the 13th embodiment, and will not be repeated herein.

The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. It is to be noted that TABLES 1-24 show different data of the different embodiments; however, the data of the different embodiments are obtained from experiments. The embodiments were chosen and described in order to best explain the principles of the disclosure and its practical applications, to thereby enable others skilled in the art to best utilize the disclosure and various embodiments with various modifications as are suited to the particular use contemplated. The embodiments depicted above and the appended drawings are exemplary and are not intended to be exhaustive or to limit the scope of the present disclosure to the precise forms disclosed. Many modifications and variations are possible in view of the above teachings. 

What is claimed is:
 1. A photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element; wherein the first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof; the second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof; the seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the seventh lens element comprises at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric; and wherein a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the fourth lens element is R7, a curvature radius of an image-side surface of the sixth lens element is R12, a maximum of refractive indexes of all the lens elements of the photographing lens assembly is Nmax, and the following conditions are satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<9.5; 0≤f/R7; 0≤f/R12; and 1.650≤Nmax<1.80.
 2. The photographing lens assembly of claim 1, wherein a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, and the following condition is satisfied: −2.0<f6/f7<0.
 3. The photographing lens assembly of claim 1, wherein the sum of the central thicknesses of the lens elements of the photographing lens assembly is ΣCT, the central thickness of the fourth lens element is CT4, the sum of the axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, the axial distance between the sixth lens element and the seventh lens element is T67, and the following condition is satisfied: 3.0<(ΣCT/CT4)+(ΣAT/T67)<9.0.
 4. The photographing lens assembly of claim 1, wherein an image-side surface of the first lens element is concave in a paraxial region thereof, and an object-side surface of the second lens element is convex in a paraxial region thereof.
 5. The photographing lens assembly of claim 1, wherein the sixth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof.
 6. The photographing lens assembly of claim 1, wherein a minimum of Abbe numbers of all the lens elements of the photographing lens assembly is Vmin, and the following condition is satisfied: 10<Vmin<20.
 7. The photographing lens assembly of claim 1, wherein an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, the axial distance between the sixth lens element and the seventh lens element is T67, and the following conditions are satisfied: 1.0<T67/T12; 1.0<T67/T23; 1.0<T67/T34; 1.0<T67/T45; and 1.0<T67/T56.
 8. The photographing lens assembly of claim 1, wherein a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, the central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, a central thickness of the seventh lens element is CT7, and the following conditions are satisfied: 1.0<CT4/CT1; 1.0CT4/CT2; 1.0<CT4/CT3; 1.0<CT4/CT5; 1.0<CT4/CT6; and 1.0<CT4/CT7.
 9. The photographing lens assembly of claim 1, wherein each of the object-side surface and the image-side surface of the seventh lens element comprises at least two inflection points, an f-number of the photographing lens assembly is Fno, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing lens assembly is ImgH, and the following conditions are satisfied: 1.0<Fno<1.95; and 0.50<TL/ImgH<1.75.
 10. The photographing lens assembly of claim 1, wherein each of the object-side surface and the image-side surface of the seventh lens element comprises at least two critical points.
 11. The photographing lens assembly of claim 1, wherein a focal length of the first lens element is f1, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, and the following conditions are satisfied: |f1|/ |f6 |<1.0; and |f1|/ |f11/1f71 |<1.0.
 12. The photographing lens assembly of claim 1, wherein the fifth lens element has negative refractive power.
 13. The photographing lens assembly of claim 1, wherein the sum of the axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, the axial distance between the sixth lens element and the seventh lens element is T67, and the following condition is satisfied: 1.0<ΣAT/T67<3.0.
 14. The photographing lens assembly of claim 1, wherein a vertical distance between a non-axial critical point on an object-side surface of the sixth lens element and an optical axis is Yc61, a vertical distance between a non-axial critical point on the image-side surface of the sixth lens element and the optical axis is Yc62, and the following condition is satisfied: 0.5<Yc61/Yc62<1.5.
 15. The photographing lens assembly of claim 1, wherein the focal length of the photographing lens assembly is f, a curvature radius of the object-side surface of the seventh lens element is R13, and the following condition is satisfied: 0.5<f/R13.
 16. The photographing lens assembly of claim 1, wherein an image-side surface of the third lens element is concave in a paraxial region thereof, and at least one of an object-side surface and the image-side surface of the third lens element comprises at least one inflection point.
 17. The photographing lens assembly of claim 1, wherein an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, an entrance pupil diameter of the photographing lens assembly is EPD, and the following condition is satisfied: 1.0<TD/EPD<1.95.
 18. An imaging apparatus, comprising: the photographing lens assembly of claim 1; and an image sensor, wherein the image sensor is disposed on an image surface of the photographing lens assembly.
 19. An electronic device, comprising: the imaging apparatus of claim
 18. 20. A photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element; wherein the first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof; the second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof; the fourth lens element has positive refractive power; the sixth lens element has positive refractive power; the seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the object-side surface of the seventh lens element comprises at least one concave shape in an off-axis region thereof, the image-side surface of the seventh lens element comprises at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric; and wherein a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the sixth lens element is R11, a curvature radius of an image-side surface of the sixth lens element is R12, a maximum of refractive indexes of all the lens elements of the photographing lens assembly is Nmax, and the following conditions are satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<9.5; 0 f/R11; 0 f/R12: and 1.650≤Nmax<1.80.
 21. The photographing lens assembly of claim 20, wherein an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, the sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, and the following condition is satisfied: 1.0<TD/Σ≤1.70.
 22. The photographing lens assembly of claim 20, wherein an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, an axial distance between the fifth lens element and the sixth lens element is T56, the axial distance between the sixth lens element and the seventh lens element is T67, and the following conditions are satisfied: 1.0<T67/T12; 1.0<T67/T23; 1.0<T67/T34; 1.0<T67/T45; and 1.0<T67/T56.
 23. The photographing lens assembly of claim 20, wherein at least one of an object-side surface and an image-side surface of the third lens element comprises at least one inflection point, the focal length of the photographing lens assembly is f, a curvature radius of the image-side surface of the third lens element is R6, and the following condition is satisfied: 0≤f/R6.
 24. The photographing lens assembly of claim 20, wherein a focal length of the first lens element is f1, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, and the following conditions are satisfied: |f1|/ |f6 |<1.0; and |f1|/ |f6 |<1.0.
 25. The photographing lens assembly of claim 20, wherein an f-number of the photographing lens assembly is Fno, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing lens assembly is ImgH, and the following conditions are satisfied: 1.0<Fno<1.95; and 0.50<TL/ImgH<1.75.
 26. The photographing lens assembly of claim 20, wherein the focal length of the photographing lens assembly is f, a curvature radius of the object-side surface of the seventh lens element is R13, and the following condition is satisfied: 0.5<f/R13.
 27. The photographing lens assembly of claim 20, wherein a central thickness of the first lens element is CT1, a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, the central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, a central thickness of the sixth lens element is CT6, a central thickness of the seventh lens element is CT7, and the following conditions are satisfied: 1.0<CT4/CT1; 1.0<CT4/CT2; 1.0<CT4/CT3; 1.0<CT4/CT5; 1.0<CT4/CT6; and 1.0<CT4/CT7.
 28. A photographing lens assembly comprising seven lens elements, the seven lens elements being, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element; wherein the first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof; the second lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof; the seventh lens element has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the seventh lens element comprises at least one convex shape in an off-axis region thereof, and the object-side surface and the image-side surface of the seventh lens element are aspheric; and wherein a sum of central thicknesses of the lens elements of the photographing lens assembly is ΣCT, a central thickness of the fourth lens element is CT4, a sum of axial distances between every two lens elements of the photographing lens assembly adjacent to each other is ΣAT, an axial distance between the sixth lens element and the seventh lens element is T67, a focal length of the photographing lens assembly is f, a curvature radius of an image-side surface of the third lens element is R6, a curvature radius of an image-side surface of the sixth lens element is R12, and the following conditions are satisfied: 2.0<(ΣCT/CT4)+(ΣAT/T67)<7.5; 0≤f/R6; and 0≤f/R12.
 29. The photographing lens assembly of claim 28, wherein a maximum of refractive indexes of all the lens elements of the photographing lens assembly is Nmax, an f-number of the photographing lens assembly is Fno, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the photographing lens assembly is ImgH, and the following conditions are satisfied: 1.650 Nmax<1.80; 1.0<Fno<1.95; and 0.50<TL/ImgH<1.75.
 30. The photographing lens assembly of claim 28, wherein the focal length of the photographing lens assembly is f, a curvature radius of an object-side surface of the fourth lens element is R7, and the following condition is satisfied: 0≤f/R7.
 31. The photographing lens assembly of claim 28, wherein the fourth lens element has positive refractive power.
 32. The photographing lens assembly of claim 28, wherein an axial distance between the object-side surface of the first lens element and the image-side surface of the seventh lens element is TD, an entrance pupil diameter of the photographing lens assembly is EPD, and the following condition is satisfied: 1.0<TD/EPD<1.95.
 33. The photographing lens assembly of claim 28, wherein a focal length of the first lens element is f1, a focal length of the sixth lens element is f6, a focal length of the seventh lens element is f7, and the following conditions are satisfied: |f1|/ |f6 |<1.0; and |f1|/ |f71 |<1.0. 